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-6-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 14:04:41,977 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:04:41,979 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:04:41,991 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-08 14:04:41,991 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-08 14:04:41,992 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-08 14:04:41,993 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-08 14:04:41,996 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-08 14:04:41,999 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-08 14:04:42,006 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-08 14:04:42,007 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-08 14:04:42,055 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-08 14:04:42,080 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:04:42,080 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:04:42,082 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:04:42,082 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:04:42,082 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:04:42,083 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:04:42,083 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:04:42,083 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:04:42,083 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-08 14:04:42,083 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:04:42,083 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-08 14:04:42,084 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-08 14:04:42,084 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:04:42,085 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:04:42,085 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:04:42,086 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:04:42,086 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:04:42,086 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:04:42,086 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:04:42,086 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:04:42,090 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:04:42,090 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:04:42,090 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:04:42,090 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:04:42,091 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:04:42,091 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:04:42,091 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:04:42,091 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:04:42,091 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:04:42,092 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:04:42,092 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:04:42,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:04:42,092 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:04:42,093 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:04:42,094 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:04:42,094 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:04:42,094 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:04:42,094 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:04:42,095 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:04:42,095 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:04:42,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:04:42,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:04:42,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:04:42,152 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:04:42,152 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:04:42,153 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl [2019-01-08 14:04:42,153 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl' [2019-01-08 14:04:42,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:04:42,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:04:42,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:04:42,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:04:42,199 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:04:42,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:04:42,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:04:42,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:04:42,259 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:04:42,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... [2019-01-08 14:04:42,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:04:42,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:04:42,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:04:42,286 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:04:42,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:04:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 14:04:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 14:04:42,757 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 14:04:42,758 INFO L286 CfgBuilder]: Removed 15 assue(true) statements. [2019-01-08 14:04:42,759 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:04:42 BoogieIcfgContainer [2019-01-08 14:04:42,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:04:42,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:04:42,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:04:42,764 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:04:42,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:42" (1/2) ... [2019-01-08 14:04:42,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122030e2 and model type speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:04:42, skipping insertion in model container [2019-01-08 14:04:42,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:04:42" (2/2) ... [2019-01-08 14:04:42,767 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-unlimited.bpl [2019-01-08 14:04:42,778 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:04:42,786 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-01-08 14:04:42,806 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-01-08 14:04:42,849 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:04:42,849 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:04:42,849 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:04:42,850 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:04:42,850 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:04:42,850 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:04:42,850 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:04:42,850 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:04:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-01-08 14:04:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 14:04:42,870 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:42,871 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 14:04:42,874 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2019-01-08 14:04:42,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:42,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:42,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:42,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:42,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:43,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:04:43,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:04:43,083 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:04:43,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:04:43,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:04:43,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:04:43,101 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-01-08 14:04:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:43,348 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-01-08 14:04:43,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:04:43,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 14:04:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:43,365 INFO L225 Difference]: With dead ends: 29 [2019-01-08 14:04:43,366 INFO L226 Difference]: Without dead ends: 24 [2019-01-08 14:04:43,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:04:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-08 14:04:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2019-01-08 14:04:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-01-08 14:04:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2019-01-08 14:04:43,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2019-01-08 14:04:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:43,415 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2019-01-08 14:04:43,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:04:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2019-01-08 14:04:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:04:43,416 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:43,416 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:04:43,417 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:43,418 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2019-01-08 14:04:43,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:43,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:43,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:43,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:43,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:43,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:43,698 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:43,699 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:04:43,701 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2019-01-08 14:04:43,740 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:43,741 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:43,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:43,813 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:04:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:43,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:43,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:43,820 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:43,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:43,840 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:43,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:44,033 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-08 14:04:44,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:04:44,338 WARN L181 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-01-08 14:04:44,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:04:44,502 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2019-01-08 14:04:44,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:04:44,725 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-01-08 14:04:44,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:44,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:44,752 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:44,805 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:44,837 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:44,862 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:44,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:44,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:44,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:45,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:45,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:45,148 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-08 14:04:45,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:04:45,157 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:45,371 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:45,418 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:45,442 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:45,458 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:45,473 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:45,554 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:45,554 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-08 14:04:45,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:45,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:04:45,646 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:45,702 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:45,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-08 14:04:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:45,778 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:45,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:45,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:04:45,844 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:45,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:04:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:04:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:04:45,846 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2019-01-08 14:04:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:46,398 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-01-08 14:04:46,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:04:46,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:04:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:46,400 INFO L225 Difference]: With dead ends: 47 [2019-01-08 14:04:46,401 INFO L226 Difference]: Without dead ends: 45 [2019-01-08 14:04:46,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:04:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-01-08 14:04:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2019-01-08 14:04:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-08 14:04:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2019-01-08 14:04:46,409 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2019-01-08 14:04:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:46,409 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2019-01-08 14:04:46,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:04:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2019-01-08 14:04:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:04:46,410 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:46,410 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:04:46,411 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2019-01-08 14:04:46,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:46,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:46,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:46,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:46,413 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:46,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:46,493 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:46,493 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:04:46,493 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2019-01-08 14:04:46,495 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:46,495 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:46,502 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:46,503 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:04:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:46,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:46,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:46,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:46,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:46,517 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:46,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:46,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:46,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:46,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:46,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,635 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 28 treesize of output 54 [2019-01-08 14:04:46,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:46,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:04:46,698 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:46,765 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:46,793 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:46,819 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:46,836 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:46,850 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:46,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:46,891 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 48 treesize of output 54 [2019-01-08 14:04:47,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:04:47,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:04:47,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:47,107 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:47,132 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:47,158 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:47,177 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:47,218 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:47,219 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:72, output treesize:71 [2019-01-08 14:04:47,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:04:47,308 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:47,338 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:47,339 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-08 14:04:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:47,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:47,376 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:04:47,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:04:47,376 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:04:47,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:04:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:04:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:04:47,377 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2019-01-08 14:04:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:47,442 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2019-01-08 14:04:47,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:04:47,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-08 14:04:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:47,450 INFO L225 Difference]: With dead ends: 23 [2019-01-08 14:04:47,450 INFO L226 Difference]: Without dead ends: 22 [2019-01-08 14:04:47,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:04:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-01-08 14:04:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-01-08 14:04:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-01-08 14:04:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2019-01-08 14:04:47,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2019-01-08 14:04:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:47,457 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2019-01-08 14:04:47,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:04:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2019-01-08 14:04:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:04:47,458 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:47,458 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:04:47,460 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2019-01-08 14:04:47,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:47,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:47,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:47,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:47,462 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:47,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:47,559 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:47,559 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:04:47,560 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2019-01-08 14:04:47,562 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:47,562 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:47,569 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:47,570 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:04:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:47,570 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:47,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:47,570 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:47,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:47,582 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:47,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:47,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:04:47,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:04:47,819 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-01-08 14:04:47,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:47,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:04:48,033 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2019-01-08 14:04:48,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:04:48,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:04:48,124 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,151 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,182 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,213 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,264 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:48,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:48,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:48,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:48,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:48,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:04:48,432 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,496 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,518 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,558 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,715 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,728 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:48,799 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:48,800 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-01-08 14:04:48,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:48,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:04:48,871 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:49,000 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:49,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:04:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:49,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:49,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:49,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:04:49,056 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:49,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:04:49,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:04:49,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:04:49,057 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2019-01-08 14:04:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:49,256 INFO L93 Difference]: Finished difference Result 39 states and 79 transitions. [2019-01-08 14:04:49,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:04:49,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:04:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:49,258 INFO L225 Difference]: With dead ends: 39 [2019-01-08 14:04:49,258 INFO L226 Difference]: Without dead ends: 36 [2019-01-08 14:04:49,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:04:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-08 14:04:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2019-01-08 14:04:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-08 14:04:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 67 transitions. [2019-01-08 14:04:49,268 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 67 transitions. Word has length 3 [2019-01-08 14:04:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:49,268 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 67 transitions. [2019-01-08 14:04:49,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:04:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 67 transitions. [2019-01-08 14:04:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:04:49,269 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:49,269 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:04:49,269 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2019-01-08 14:04:49,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:49,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:49,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:49,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:49,271 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:49,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:49,369 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:49,369 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:04:49,369 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2019-01-08 14:04:49,372 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:49,372 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:49,384 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:49,384 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:04:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:49,384 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:49,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:49,386 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:49,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:49,397 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:49,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:49,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:49,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:49,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:49,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:49,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:49,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:49,634 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-08 14:04:49,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:04:49,637 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:49,884 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:49,915 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:49,936 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:49,954 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:49,970 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,006 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 48 treesize of output 54 [2019-01-08 14:04:50,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:04:50,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:04:50,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:50,161 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,180 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,197 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,214 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,252 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:50,252 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-08 14:04:50,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:04:50,298 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,337 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:50,338 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-08 14:04:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:50,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:50,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:50,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:04:50,395 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:50,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:04:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:04:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:04:50,396 INFO L87 Difference]: Start difference. First operand 23 states and 67 transitions. Second operand 6 states. [2019-01-08 14:04:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:50,586 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2019-01-08 14:04:50,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:04:50,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:04:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:50,588 INFO L225 Difference]: With dead ends: 49 [2019-01-08 14:04:50,588 INFO L226 Difference]: Without dead ends: 47 [2019-01-08 14:04:50,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:04:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-01-08 14:04:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2019-01-08 14:04:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-08 14:04:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 80 transitions. [2019-01-08 14:04:50,596 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 80 transitions. Word has length 3 [2019-01-08 14:04:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:50,597 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 80 transitions. [2019-01-08 14:04:50,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:04:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 80 transitions. [2019-01-08 14:04:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:04:50,597 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:50,597 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:04:50,598 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2019-01-08 14:04:50,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:50,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:50,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:50,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:50,600 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:50,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:50,676 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:50,676 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:04:50,676 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2019-01-08 14:04:50,678 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:50,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:50,685 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:50,685 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:04:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:50,685 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:50,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:50,686 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:50,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:50,697 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:50,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:50,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:50,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:50,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:50,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:50,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:50,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:04:50,813 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,881 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,908 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,928 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,948 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,962 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:04:51,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:04:51,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:04:51,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:51,142 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,160 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,188 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,216 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,262 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:51,263 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:04:51,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:04:51,325 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,363 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:51,364 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:04:51,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-08 14:04:51,452 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,501 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:51,501 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-08 14:04:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:51,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:51,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:51,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:04:51,599 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:51,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:04:51,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:04:51,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:04:51,600 INFO L87 Difference]: Start difference. First operand 25 states and 80 transitions. Second operand 8 states. [2019-01-08 14:04:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:52,254 INFO L93 Difference]: Finished difference Result 61 states and 138 transitions. [2019-01-08 14:04:52,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:04:52,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:04:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:52,256 INFO L225 Difference]: With dead ends: 61 [2019-01-08 14:04:52,257 INFO L226 Difference]: Without dead ends: 57 [2019-01-08 14:04:52,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:04:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-08 14:04:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-08 14:04:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-08 14:04:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 98 transitions. [2019-01-08 14:04:52,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 98 transitions. Word has length 4 [2019-01-08 14:04:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:52,267 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 98 transitions. [2019-01-08 14:04:52,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:04:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 98 transitions. [2019-01-08 14:04:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:04:52,268 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:52,269 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:04:52,269 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2019-01-08 14:04:52,269 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:52,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:52,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:52,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:52,271 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:52,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:52,409 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:52,410 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:04:52,410 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2019-01-08 14:04:52,411 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:52,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:52,420 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:52,420 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:04:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:52,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:52,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:52,421 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:52,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:52,430 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:52,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:52,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:04:52,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:04:52,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:04:52,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:04:52,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:52,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:04:52,731 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:52,757 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:52,785 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:52,814 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:52,843 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:53,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:53,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:53,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:53,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:53,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:53,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:04:53,339 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:53,399 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:53,420 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:53,436 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:53,450 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:53,461 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:53,514 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:53,514 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:04:53,757 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-01-08 14:04:53,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:53,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:04:53,805 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:54,322 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:54,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:04:54,545 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-08 14:04:54,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:54,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:54,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:54,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:54,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:54,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:54,717 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:04:54,718 INFO L303 Elim1Store]: Index analysis took 168 ms [2019-01-08 14:04:54,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:04:54,720 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:55,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:55,287 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-08 14:04:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:55,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:55,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:55,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:04:55,615 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:55,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:04:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:04:55,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:04:55,616 INFO L87 Difference]: Start difference. First operand 29 states and 98 transitions. Second operand 8 states. [2019-01-08 14:04:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:56,146 INFO L93 Difference]: Finished difference Result 59 states and 140 transitions. [2019-01-08 14:04:56,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:04:56,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:04:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:56,148 INFO L225 Difference]: With dead ends: 59 [2019-01-08 14:04:56,148 INFO L226 Difference]: Without dead ends: 55 [2019-01-08 14:04:56,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:04:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-08 14:04:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-01-08 14:04:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-08 14:04:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2019-01-08 14:04:56,157 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2019-01-08 14:04:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:56,157 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2019-01-08 14:04:56,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:04:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2019-01-08 14:04:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:04:56,158 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:56,158 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:04:56,158 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:56,159 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2019-01-08 14:04:56,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:56,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:56,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:56,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:56,160 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:56,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:56,282 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:56,282 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:04:56,282 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2019-01-08 14:04:56,283 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:56,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:56,289 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:56,289 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:04:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:56,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:56,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:56,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:56,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:56,303 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:56,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:56,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:56,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:56,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:56,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:56,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:56,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:04:56,419 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,459 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,486 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,514 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,533 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:04:56,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:04:56,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:04:56,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:56,743 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,762 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,778 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,795 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,829 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:56,829 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:04:56,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:04:56,868 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:56,900 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:04:56,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:56,928 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:04:56,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-08 14:04:56,930 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:56,967 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:56,968 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-01-08 14:04:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:56,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:57,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:57,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:04:57,025 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:57,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:04:57,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:04:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:04:57,026 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2019-01-08 14:04:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:57,492 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2019-01-08 14:04:57,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:04:57,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:04:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:57,494 INFO L225 Difference]: With dead ends: 57 [2019-01-08 14:04:57,494 INFO L226 Difference]: Without dead ends: 55 [2019-01-08 14:04:57,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:04:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-08 14:04:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-01-08 14:04:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-08 14:04:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2019-01-08 14:04:57,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2019-01-08 14:04:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:57,504 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2019-01-08 14:04:57,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:04:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2019-01-08 14:04:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:04:57,505 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:57,505 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:04:57,506 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:57,506 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2019-01-08 14:04:57,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:57,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:57,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:57,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:57,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:57,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:57,600 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:57,600 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:04:57,600 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2019-01-08 14:04:57,602 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:57,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:57,606 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:57,606 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:04:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:57,607 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:57,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:57,607 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:57,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:57,616 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:57,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:57,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:04:57,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:04:57,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:04:57,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:57,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:57,789 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,805 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,822 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,839 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:57,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:57,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:57,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:57,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:57,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:04:57,897 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,932 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,953 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,970 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,983 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:57,996 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:58,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:58,031 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:04:58,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:04:58,080 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:58,108 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:58,109 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:04:58,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:58,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:04:58,147 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:58,180 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:58,181 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-08 14:04:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:58,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:58,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:58,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:04:58,249 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:58,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:04:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:04:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:04:58,250 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2019-01-08 14:04:58,422 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-01-08 14:04:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:58,895 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2019-01-08 14:04:58,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:04:58,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:04:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:58,897 INFO L225 Difference]: With dead ends: 57 [2019-01-08 14:04:58,898 INFO L226 Difference]: Without dead ends: 53 [2019-01-08 14:04:58,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:04:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-01-08 14:04:58,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-01-08 14:04:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-08 14:04:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2019-01-08 14:04:58,909 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2019-01-08 14:04:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:58,909 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2019-01-08 14:04:58,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:04:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2019-01-08 14:04:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:04:58,910 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:58,910 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:04:58,910 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:58,911 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2019-01-08 14:04:58,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:58,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:58,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:58,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:58,912 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:58,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:58,998 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:58,999 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:04:58,999 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2019-01-08 14:04:59,000 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:59,001 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:59,005 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:59,006 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:04:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:59,006 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:59,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:59,006 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:04:59,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:59,018 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:59,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:59,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:04:59,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:04:59,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:04:59,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:59,162 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,179 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,255 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,273 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:04:59,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:04:59,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:04:59,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:04:59,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:04:59,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:04:59,321 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,347 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,367 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,383 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,397 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,408 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,441 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:59,441 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-08 14:04:59,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:04:59,509 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:59,540 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:04:59,540 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:04:59,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:59,741 INFO L303 Elim1Store]: Index analysis took 177 ms [2019-01-08 14:04:59,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:04:59,742 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:00,055 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:00,055 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-01-08 14:05:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:00,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:00,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:00,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:05:00,117 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:00,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:05:00,118 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2019-01-08 14:05:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:00,528 INFO L93 Difference]: Finished difference Result 73 states and 228 transitions. [2019-01-08 14:05:00,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:05:00,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:05:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:00,530 INFO L225 Difference]: With dead ends: 73 [2019-01-08 14:05:00,531 INFO L226 Difference]: Without dead ends: 71 [2019-01-08 14:05:00,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:05:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-01-08 14:05:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2019-01-08 14:05:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-08 14:05:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 173 transitions. [2019-01-08 14:05:00,545 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 173 transitions. Word has length 4 [2019-01-08 14:05:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:00,545 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 173 transitions. [2019-01-08 14:05:00,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 173 transitions. [2019-01-08 14:05:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:00,546 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:00,546 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:00,547 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2019-01-08 14:05:00,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:00,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:00,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:00,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:00,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:00,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:00,589 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:00,589 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:00,590 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2019-01-08 14:05:00,591 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:00,591 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:00,600 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:00,600 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:00,600 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:00,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:00,601 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:00,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:00,616 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:00,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:00,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:00,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:00,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:00,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:00,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:00,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:00,719 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:00,750 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:00,775 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:00,795 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:00,811 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:00,825 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:00,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:00,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:00,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:00,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:00,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:00,996 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:01,017 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:01,035 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:01,053 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:01,097 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:01,097 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:01,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:05:01,191 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:01,223 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:01,223 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:01,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:01,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:01,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:01,268 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:01,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:01,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:01,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:01,268 INFO L87 Difference]: Start difference. First operand 40 states and 173 transitions. Second operand 6 states. [2019-01-08 14:05:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:01,527 INFO L93 Difference]: Finished difference Result 56 states and 192 transitions. [2019-01-08 14:05:01,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:01,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:05:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:01,530 INFO L225 Difference]: With dead ends: 56 [2019-01-08 14:05:01,530 INFO L226 Difference]: Without dead ends: 55 [2019-01-08 14:05:01,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-08 14:05:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2019-01-08 14:05:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-01-08 14:05:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 180 transitions. [2019-01-08 14:05:01,543 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 180 transitions. Word has length 4 [2019-01-08 14:05:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:01,543 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 180 transitions. [2019-01-08 14:05:01,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 180 transitions. [2019-01-08 14:05:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:01,544 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:01,544 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:01,544 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash 945434, now seen corresponding path program 1 times [2019-01-08 14:05:01,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:01,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:01,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:01,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:01,545 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:01,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:01,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:01,691 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:01,692 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [27] [2019-01-08 14:05:01,694 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:01,694 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:01,698 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:01,698 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:01,699 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:01,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:01,699 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:01,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:01,710 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:01,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:01,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:01,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:02,279 WARN L181 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-01-08 14:05:02,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,389 INFO L303 Elim1Store]: Index analysis took 108 ms [2019-01-08 14:05:02,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:02,612 WARN L181 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2019-01-08 14:05:02,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:02,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:02,729 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,757 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,785 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,818 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,850 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:02,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:02,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:02,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:02,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:02,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:02,932 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,972 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,993 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,009 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,043 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,056 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,102 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:03,103 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:03,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:05:03,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,243 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:03,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:03,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:05:03,373 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,420 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:03,420 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:05:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:03,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:03,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:03,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:05:03,477 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:03,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:03,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:03,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:05:03,478 INFO L87 Difference]: Start difference. First operand 42 states and 180 transitions. Second operand 8 states. [2019-01-08 14:05:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:03,972 INFO L93 Difference]: Finished difference Result 96 states and 313 transitions. [2019-01-08 14:05:03,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:05:03,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:05:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:03,974 INFO L225 Difference]: With dead ends: 96 [2019-01-08 14:05:03,974 INFO L226 Difference]: Without dead ends: 93 [2019-01-08 14:05:03,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:05:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-01-08 14:05:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2019-01-08 14:05:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-01-08 14:05:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 250 transitions. [2019-01-08 14:05:03,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 250 transitions. Word has length 4 [2019-01-08 14:05:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:03,989 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 250 transitions. [2019-01-08 14:05:03,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 250 transitions. [2019-01-08 14:05:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:03,990 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:03,990 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:03,990 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2019-01-08 14:05:03,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:03,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:03,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:03,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:03,992 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:04,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:04,117 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:04,117 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:04,117 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2019-01-08 14:05:04,119 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:04,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:04,123 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:04,123 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:04,125 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:04,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:04,126 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:04,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:04,134 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:04,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:04,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:04,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:04,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:04,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:04,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:04,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:04,208 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,235 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,257 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,275 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,289 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,302 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:04,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:04,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:04,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:04,449 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,465 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,482 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,497 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:04,530 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:04,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:05:04,572 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:04,601 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:04,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-08 14:05:04,632 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,667 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:04,668 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-01-08 14:05:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:04,778 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:04,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:04,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:04,822 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:04,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:04,823 INFO L87 Difference]: Start difference. First operand 55 states and 250 transitions. Second operand 8 states. [2019-01-08 14:05:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:05,278 INFO L93 Difference]: Finished difference Result 84 states and 299 transitions. [2019-01-08 14:05:05,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:05,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:05:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:05,280 INFO L225 Difference]: With dead ends: 84 [2019-01-08 14:05:05,280 INFO L226 Difference]: Without dead ends: 82 [2019-01-08 14:05:05,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-08 14:05:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2019-01-08 14:05:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-01-08 14:05:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 270 transitions. [2019-01-08 14:05:05,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 270 transitions. Word has length 4 [2019-01-08 14:05:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:05,295 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 270 transitions. [2019-01-08 14:05:05,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 270 transitions. [2019-01-08 14:05:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:05,296 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:05,296 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:05,297 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:05,297 INFO L82 PathProgramCache]: Analyzing trace with hash 946922, now seen corresponding path program 1 times [2019-01-08 14:05:05,297 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:05,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:05,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:05,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:05,298 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:05,615 WARN L181 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-08 14:05:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:05,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:05,827 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:05,827 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:05,828 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [27] [2019-01-08 14:05:05,830 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:05,830 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:05,834 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:05,835 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:05,835 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:05,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:05,835 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:05,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:05,851 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:05,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:05,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:05,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:05,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:05,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:05,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:05,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:05,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:06,004 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,043 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,066 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,084 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,097 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,111 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:06,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:06,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:06,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:06,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:06,354 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,380 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,431 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,458 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,485 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,528 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:06,529 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:06,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:05:06,593 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:06,651 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:06,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,729 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:06,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-08 14:05:06,730 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:06,785 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:06,786 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-08 14:05:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:06,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:06,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:06,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:06,922 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:06,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:06,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:06,923 INFO L87 Difference]: Start difference. First operand 58 states and 270 transitions. Second operand 8 states. [2019-01-08 14:05:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:07,705 INFO L93 Difference]: Finished difference Result 91 states and 313 transitions. [2019-01-08 14:05:07,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:07,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:05:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:07,706 INFO L225 Difference]: With dead ends: 91 [2019-01-08 14:05:07,706 INFO L226 Difference]: Without dead ends: 89 [2019-01-08 14:05:07,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-08 14:05:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2019-01-08 14:05:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-08 14:05:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 277 transitions. [2019-01-08 14:05:07,720 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 277 transitions. Word has length 4 [2019-01-08 14:05:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:07,720 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 277 transitions. [2019-01-08 14:05:07,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 277 transitions. [2019-01-08 14:05:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:07,721 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:07,721 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:07,722 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:07,722 INFO L82 PathProgramCache]: Analyzing trace with hash 934028, now seen corresponding path program 1 times [2019-01-08 14:05:07,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:07,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:07,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:07,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:07,723 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:07,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:07,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:07,778 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:07,778 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [29] [2019-01-08 14:05:07,779 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:07,779 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:07,783 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:07,783 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:07,783 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:07,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:07,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:07,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:07,793 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:07,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:07,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:07,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:05:07,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:05:07,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:05:07,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:05:07,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:05:07,874 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:07,902 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:07,924 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:07,942 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:07,953 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:07,966 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:07,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:05:08,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:05:08,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:05:08,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:05:08,086 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,318 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,368 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,384 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,414 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:08,415 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:64, output treesize:67 [2019-01-08 14:05:08,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:05:08,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:05:08,577 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:05:08,578 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:92 [2019-01-08 14:05:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:08,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:08,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:05:08,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:05:08,651 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:08,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:05:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:05:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:05:08,652 INFO L87 Difference]: Start difference. First operand 59 states and 277 transitions. Second operand 4 states. [2019-01-08 14:05:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:08,722 INFO L93 Difference]: Finished difference Result 90 states and 454 transitions. [2019-01-08 14:05:08,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:05:08,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-08 14:05:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:08,724 INFO L225 Difference]: With dead ends: 90 [2019-01-08 14:05:08,724 INFO L226 Difference]: Without dead ends: 89 [2019-01-08 14:05:08,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:05:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-08 14:05:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2019-01-08 14:05:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-08 14:05:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 449 transitions. [2019-01-08 14:05:08,755 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 449 transitions. Word has length 4 [2019-01-08 14:05:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:08,755 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 449 transitions. [2019-01-08 14:05:08,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:05:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 449 transitions. [2019-01-08 14:05:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:08,757 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:08,759 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:08,759 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash 933592, now seen corresponding path program 1 times [2019-01-08 14:05:08,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:08,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:08,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:08,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:08,761 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:08,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:08,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:08,865 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:08,865 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [27] [2019-01-08 14:05:08,866 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:08,866 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:08,872 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:08,872 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:08,873 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:08,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:08,873 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:08,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:08,883 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:08,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:08,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:08,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:09,119 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2019-01-08 14:05:09,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:09,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:09,191 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,216 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,241 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,268 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:09,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:09,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:09,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:09,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:09,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:09,327 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,358 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,382 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,400 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,416 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,428 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,464 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:09,464 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:09,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:05:09,560 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,591 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:09,591 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:09,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:05:09,619 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:09,650 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-08 14:05:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:09,669 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:09,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:09,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:09,710 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:09,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:09,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:09,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:09,711 INFO L87 Difference]: Start difference. First operand 83 states and 449 transitions. Second operand 8 states. [2019-01-08 14:05:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:10,145 INFO L93 Difference]: Finished difference Result 121 states and 532 transitions. [2019-01-08 14:05:10,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:10,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:05:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:10,148 INFO L225 Difference]: With dead ends: 121 [2019-01-08 14:05:10,148 INFO L226 Difference]: Without dead ends: 119 [2019-01-08 14:05:10,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-01-08 14:05:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2019-01-08 14:05:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-08 14:05:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-01-08 14:05:10,166 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-01-08 14:05:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:10,166 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-01-08 14:05:10,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-01-08 14:05:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:10,167 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:10,168 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:10,168 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash 937872, now seen corresponding path program 1 times [2019-01-08 14:05:10,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:10,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:10,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:10,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:10,169 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:10,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:10,237 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:10,238 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:10,238 INFO L207 CegarAbsIntRunner]: [0], [14], [28], [29] [2019-01-08 14:05:10,238 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:10,239 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:10,242 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:10,242 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:10,243 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:10,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:10,243 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:10,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:10,256 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:10,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:10,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:10,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:05:10,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:05:10,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:05:10,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:05:10,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:05:10,343 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,369 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,390 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,406 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,420 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,433 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:05:10,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:05:10,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:05:10,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:05:10,560 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,573 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,588 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,604 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:10,636 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-08 14:05:10,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-08 14:05:10,694 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,722 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:10,723 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2019-01-08 14:05:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:10,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:10,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:10,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:10,770 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:10,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:10,771 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 6 states. [2019-01-08 14:05:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:11,001 INFO L93 Difference]: Finished difference Result 110 states and 511 transitions. [2019-01-08 14:05:11,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:11,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:05:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:11,003 INFO L225 Difference]: With dead ends: 110 [2019-01-08 14:05:11,003 INFO L226 Difference]: Without dead ends: 109 [2019-01-08 14:05:11,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-01-08 14:05:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2019-01-08 14:05:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-08 14:05:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-01-08 14:05:11,018 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-01-08 14:05:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:11,018 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-01-08 14:05:11,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-01-08 14:05:11,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:11,019 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:11,020 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-08 14:05:11,020 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:11,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:11,020 INFO L82 PathProgramCache]: Analyzing trace with hash 29182900, now seen corresponding path program 2 times [2019-01-08 14:05:11,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:11,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:11,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:11,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:11,021 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:11,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:11,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:11,089 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:05:11,089 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:05:11,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:11,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:11,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:05:11,098 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:05:11,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:05:11,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:05:11,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:11,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:11,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:11,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:11,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:11,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:11,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:11,279 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,319 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,427 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,445 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,458 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,470 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:11,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:11,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:11,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:11,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:11,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:11,754 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,794 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,836 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,867 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,900 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:11,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:11,964 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:12,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:05:12,001 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:12,057 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:12,057 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:12,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 103 [2019-01-08 14:05:12,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:12,134 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:12,134 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:71 [2019-01-08 14:05:12,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:12,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:05:12,165 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:12,215 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:12,215 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-08 14:05:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:12,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:12,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:12,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:05:12,911 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:12,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:12,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:12,912 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 10 states. [2019-01-08 14:05:13,882 WARN L181 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-01-08 14:05:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:15,094 INFO L93 Difference]: Finished difference Result 133 states and 606 transitions. [2019-01-08 14:05:15,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:05:15,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:15,096 INFO L225 Difference]: With dead ends: 133 [2019-01-08 14:05:15,097 INFO L226 Difference]: Without dead ends: 128 [2019-01-08 14:05:15,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-01-08 14:05:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2019-01-08 14:05:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-01-08 14:05:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 538 transitions. [2019-01-08 14:05:15,116 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 538 transitions. Word has length 5 [2019-01-08 14:05:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:15,116 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 538 transitions. [2019-01-08 14:05:15,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 538 transitions. [2019-01-08 14:05:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:15,117 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:15,117 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:15,118 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:15,118 INFO L82 PathProgramCache]: Analyzing trace with hash 29172052, now seen corresponding path program 1 times [2019-01-08 14:05:15,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:15,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:15,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:05:15,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:15,119 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:15,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:15,207 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:15,207 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:15,207 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [29] [2019-01-08 14:05:15,209 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:15,209 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:15,212 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:15,213 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:15,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:15,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:15,214 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:15,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:15,226 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:15,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:15,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:15,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:15,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:15,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:15,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:15,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:15,297 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,326 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,347 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,366 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,380 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,394 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:15,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:15,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:15,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:15,549 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,567 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,583 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,599 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,633 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:15,634 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:15,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:05:15,699 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,725 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:15,726 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:15,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:05:15,757 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,791 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:15,792 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-08 14:05:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:15,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:15,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:15,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:15,907 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:15,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:15,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:15,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:15,907 INFO L87 Difference]: Start difference. First operand 95 states and 538 transitions. Second operand 8 states. [2019-01-08 14:05:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:16,277 INFO L93 Difference]: Finished difference Result 125 states and 622 transitions. [2019-01-08 14:05:16,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:16,278 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:05:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:16,280 INFO L225 Difference]: With dead ends: 125 [2019-01-08 14:05:16,280 INFO L226 Difference]: Without dead ends: 124 [2019-01-08 14:05:16,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-01-08 14:05:16,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2019-01-08 14:05:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-01-08 14:05:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 589 transitions. [2019-01-08 14:05:16,300 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 589 transitions. Word has length 5 [2019-01-08 14:05:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:16,301 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 589 transitions. [2019-01-08 14:05:16,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 589 transitions. [2019-01-08 14:05:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:16,302 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:16,302 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:16,302 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash 29187302, now seen corresponding path program 1 times [2019-01-08 14:05:16,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:16,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:16,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:16,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:16,304 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:16,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:16,471 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:16,471 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:16,471 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [27] [2019-01-08 14:05:16,473 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:16,473 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:16,476 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:16,476 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:16,477 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:16,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:16,477 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:16,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:16,488 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:16,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:16,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:16,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:16,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:16,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:16,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:16,749 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,774 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,819 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,850 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,883 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:16,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:16,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:16,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:16,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:16,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:16,949 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,006 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,040 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,064 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,084 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,099 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,169 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:17,169 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:17,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:05:17,233 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:17,296 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:17,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:05:17,338 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,384 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:17,384 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:05:17,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,423 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:17,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:05:17,426 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,480 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:17,481 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:05:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:17,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:17,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:17,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:17,568 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:17,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:17,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:17,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:17,569 INFO L87 Difference]: Start difference. First operand 102 states and 589 transitions. Second operand 10 states. [2019-01-08 14:05:17,705 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-01-08 14:05:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:19,506 INFO L93 Difference]: Finished difference Result 149 states and 665 transitions. [2019-01-08 14:05:19,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:05:19,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:19,509 INFO L225 Difference]: With dead ends: 149 [2019-01-08 14:05:19,509 INFO L226 Difference]: Without dead ends: 145 [2019-01-08 14:05:19,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:05:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-01-08 14:05:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2019-01-08 14:05:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-01-08 14:05:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 605 transitions. [2019-01-08 14:05:19,530 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 605 transitions. Word has length 5 [2019-01-08 14:05:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:19,531 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 605 transitions. [2019-01-08 14:05:19,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 605 transitions. [2019-01-08 14:05:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:19,532 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:19,532 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:19,532 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:19,532 INFO L82 PathProgramCache]: Analyzing trace with hash 29186868, now seen corresponding path program 1 times [2019-01-08 14:05:19,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:19,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:19,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:19,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:19,535 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:19,697 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:05:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:19,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:19,796 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:19,796 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:19,796 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [27] [2019-01-08 14:05:19,800 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:19,800 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:19,804 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:19,804 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:19,805 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:19,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:19,805 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:19,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:19,817 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:19,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:19,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:19,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:19,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:19,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:19,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:19,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:19,968 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:19,996 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,018 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,035 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,049 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,062 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:20,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:20,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:20,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:20,215 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,233 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,247 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,263 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,295 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:20,295 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:20,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:05:20,350 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:20,377 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:20,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-08 14:05:20,407 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,437 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:20,437 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-08 14:05:20,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,469 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:20,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-08 14:05:20,472 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:20,506 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-08 14:05:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:20,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:20,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:20,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:20,586 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:20,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:20,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:20,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:20,587 INFO L87 Difference]: Start difference. First operand 105 states and 605 transitions. Second operand 10 states. [2019-01-08 14:05:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:21,129 INFO L93 Difference]: Finished difference Result 138 states and 662 transitions. [2019-01-08 14:05:21,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:21,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:21,132 INFO L225 Difference]: With dead ends: 138 [2019-01-08 14:05:21,132 INFO L226 Difference]: Without dead ends: 136 [2019-01-08 14:05:21,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:05:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-01-08 14:05:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2019-01-08 14:05:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-08 14:05:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-08 14:05:21,153 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 5 [2019-01-08 14:05:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:21,154 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-08 14:05:21,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-08 14:05:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:21,154 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:21,155 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:21,155 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash 29188666, now seen corresponding path program 1 times [2019-01-08 14:05:21,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:21,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:21,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:21,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:21,156 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:21,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:21,262 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:21,263 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:21,263 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [27] [2019-01-08 14:05:21,263 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:21,264 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:21,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:21,267 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:21,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:21,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:21,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:21,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:21,276 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:21,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:21,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:21,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:21,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:21,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:21,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:21,533 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,558 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,584 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,611 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,639 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:21,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:21,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:21,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:21,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:21,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:21,714 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,060 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,080 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,096 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,109 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,121 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,166 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:22,166 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:22,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:05:22,194 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:22,237 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:22,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,308 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:22,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:05:22,309 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:22,354 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-08 14:05:22,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-08 14:05:22,390 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,476 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:22,477 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-08 14:05:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:22,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:22,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:22,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:05:22,541 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:22,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:22,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:22,542 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 10 states. [2019-01-08 14:05:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:23,147 INFO L93 Difference]: Finished difference Result 152 states and 738 transitions. [2019-01-08 14:05:23,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:05:23,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:23,152 INFO L225 Difference]: With dead ends: 152 [2019-01-08 14:05:23,152 INFO L226 Difference]: Without dead ends: 151 [2019-01-08 14:05:23,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:05:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-01-08 14:05:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2019-01-08 14:05:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-01-08 14:05:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 612 transitions. [2019-01-08 14:05:23,175 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 612 transitions. Word has length 5 [2019-01-08 14:05:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:23,175 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 612 transitions. [2019-01-08 14:05:23,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 612 transitions. [2019-01-08 14:05:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:23,176 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:23,176 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:23,177 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash 29188790, now seen corresponding path program 1 times [2019-01-08 14:05:23,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:23,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:23,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:23,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:23,178 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:23,425 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-01-08 14:05:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:23,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:23,466 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:23,466 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:23,466 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [27] [2019-01-08 14:05:23,468 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:23,468 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:23,471 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:23,471 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:23,471 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:23,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:23,472 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:23,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:23,482 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:23,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:23,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:23,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:23,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:23,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,685 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:23,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:23,765 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,830 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,860 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,892 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,923 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:23,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:23,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:23,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:23,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:23,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:23,980 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,017 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,037 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,051 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,064 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,075 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,119 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:24,119 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:24,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:05:24,156 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:24,201 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:24,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,234 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:24,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:05:24,236 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,282 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:24,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-08 14:05:24,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,359 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:24,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2019-01-08 14:05:24,361 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,495 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:24,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2019-01-08 14:05:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:25,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:26,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:26,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:26,039 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:26,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:26,040 INFO L87 Difference]: Start difference. First operand 106 states and 612 transitions. Second operand 10 states. [2019-01-08 14:05:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:26,770 INFO L93 Difference]: Finished difference Result 141 states and 665 transitions. [2019-01-08 14:05:26,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:26,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:26,773 INFO L225 Difference]: With dead ends: 141 [2019-01-08 14:05:26,773 INFO L226 Difference]: Without dead ends: 140 [2019-01-08 14:05:26,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:05:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-01-08 14:05:26,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2019-01-08 14:05:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-01-08 14:05:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 619 transitions. [2019-01-08 14:05:26,795 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 619 transitions. Word has length 5 [2019-01-08 14:05:26,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:26,795 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 619 transitions. [2019-01-08 14:05:26,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:26,795 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 619 transitions. [2019-01-08 14:05:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:26,796 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:26,796 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:26,796 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 29175212, now seen corresponding path program 1 times [2019-01-08 14:05:26,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:26,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:26,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:26,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:26,798 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:27,148 WARN L181 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2019-01-08 14:05:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:27,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:27,190 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:27,190 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:27,190 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [27] [2019-01-08 14:05:27,191 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:27,191 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:27,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:27,193 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:27,194 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:27,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:27,194 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:27,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:27,205 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:27,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:27,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:27,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:27,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:27,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:27,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:27,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:27,317 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,354 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,380 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,398 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,413 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,428 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:27,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:27,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:27,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:27,583 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,600 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,617 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,635 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:27,671 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:27,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:05:27,711 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,740 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:27,741 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:27,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,771 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:27,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-08 14:05:27,773 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,814 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:27,814 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-01-08 14:05:27,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2019-01-08 14:05:27,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,890 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:27,891 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-01-08 14:05:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:27,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:27,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:27,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:05:27,961 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:27,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:27,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:27,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:27,961 INFO L87 Difference]: Start difference. First operand 107 states and 619 transitions. Second operand 10 states. [2019-01-08 14:05:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:28,518 INFO L93 Difference]: Finished difference Result 163 states and 816 transitions. [2019-01-08 14:05:28,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:05:28,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:28,521 INFO L225 Difference]: With dead ends: 163 [2019-01-08 14:05:28,521 INFO L226 Difference]: Without dead ends: 162 [2019-01-08 14:05:28,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:05:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-01-08 14:05:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2019-01-08 14:05:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-01-08 14:05:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 682 transitions. [2019-01-08 14:05:28,544 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 682 transitions. Word has length 5 [2019-01-08 14:05:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 682 transitions. [2019-01-08 14:05:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 682 transitions. [2019-01-08 14:05:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:28,545 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:28,545 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:28,545 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash 29179614, now seen corresponding path program 1 times [2019-01-08 14:05:28,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:28,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:28,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:28,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:28,547 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:28,702 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:05:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:28,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:28,781 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:28,781 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:28,781 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [27] [2019-01-08 14:05:28,782 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:28,782 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:28,785 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:28,785 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:28,786 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:28,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:28,786 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:28,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:28,794 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:28,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:28,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:28,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:28,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:28,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:29,105 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-08 14:05:29,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:29,119 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,145 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,172 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,199 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,227 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:29,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:29,270 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:29,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:29,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:29,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:29,282 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,317 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,337 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,353 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,365 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,377 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:29,422 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:29,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:05:29,455 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:29,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:29,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:05:29,537 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,583 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:29,584 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:05:29,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,620 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:29,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:05:29,622 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:29,672 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:05:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:29,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:29,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:29,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:29,752 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:29,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:29,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:29,753 INFO L87 Difference]: Start difference. First operand 116 states and 682 transitions. Second operand 10 states. [2019-01-08 14:05:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:30,434 INFO L93 Difference]: Finished difference Result 163 states and 796 transitions. [2019-01-08 14:05:30,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:30,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:30,437 INFO L225 Difference]: With dead ends: 163 [2019-01-08 14:05:30,437 INFO L226 Difference]: Without dead ends: 160 [2019-01-08 14:05:30,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:05:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-01-08 14:05:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2019-01-08 14:05:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-08 14:05:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 724 transitions. [2019-01-08 14:05:30,462 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 724 transitions. Word has length 5 [2019-01-08 14:05:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:30,462 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 724 transitions. [2019-01-08 14:05:30,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 724 transitions. [2019-01-08 14:05:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:30,463 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:30,463 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:30,463 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:30,464 INFO L82 PathProgramCache]: Analyzing trace with hash 29179180, now seen corresponding path program 1 times [2019-01-08 14:05:30,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:30,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:30,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:30,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:30,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:30,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:30,623 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:30,623 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:30,623 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [27] [2019-01-08 14:05:30,624 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:30,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:30,627 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:30,627 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:30,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:30,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:30,628 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:30,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:30,640 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:30,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:30,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:30,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:30,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:30,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:30,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:30,880 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:30,897 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:30,913 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:30,929 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:30,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:30,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:30,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:30,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:30,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:30,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:30,974 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:30,999 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,020 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,035 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,048 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,060 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,093 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:31,094 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:31,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:05:31,146 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,172 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:31,172 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:31,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:05:31,204 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,241 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:31,241 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-08 14:05:31,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,315 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:31,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:31,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-08 14:05:31,318 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:31,352 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:31,352 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-08 14:05:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:31,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:31,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:31,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:31,432 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:31,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:31,433 INFO L87 Difference]: Start difference. First operand 122 states and 724 transitions. Second operand 10 states. [2019-01-08 14:05:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:32,020 INFO L93 Difference]: Finished difference Result 165 states and 829 transitions. [2019-01-08 14:05:32,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:32,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:32,022 INFO L225 Difference]: With dead ends: 165 [2019-01-08 14:05:32,022 INFO L226 Difference]: Without dead ends: 163 [2019-01-08 14:05:32,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:05:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-01-08 14:05:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2019-01-08 14:05:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-08 14:05:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 745 transitions. [2019-01-08 14:05:32,050 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 745 transitions. Word has length 5 [2019-01-08 14:05:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:32,051 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 745 transitions. [2019-01-08 14:05:32,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 745 transitions. [2019-01-08 14:05:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:32,051 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:32,052 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:32,052 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash 28829936, now seen corresponding path program 1 times [2019-01-08 14:05:32,052 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:32,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:32,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:32,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:32,053 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:05:32,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:32,133 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:32,133 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:32,133 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [29] [2019-01-08 14:05:32,134 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:32,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:32,136 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:32,136 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:32,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:32,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:32,137 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:32,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:32,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:32,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:32,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:32,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:32,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:32,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:32,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:32,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:32,236 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,295 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,332 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,361 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,382 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,397 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:32,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:32,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:32,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:32,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:32,558 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,575 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,590 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,606 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:32,638 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:32,639 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:33,116 WARN L181 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2019-01-08 14:05:33,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:05:33,122 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:33,150 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:33,151 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:33,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,177 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:33,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:05:33,179 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:33,210 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:33,210 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-01-08 14:05:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:33,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:33,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:33,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-08 14:05:33,271 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:33,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-08 14:05:33,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-08 14:05:33,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:05:33,272 INFO L87 Difference]: Start difference. First operand 125 states and 745 transitions. Second operand 7 states. [2019-01-08 14:05:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:33,556 INFO L93 Difference]: Finished difference Result 158 states and 796 transitions. [2019-01-08 14:05:33,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:33,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-01-08 14:05:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:33,559 INFO L225 Difference]: With dead ends: 158 [2019-01-08 14:05:33,559 INFO L226 Difference]: Without dead ends: 156 [2019-01-08 14:05:33,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:05:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-01-08 14:05:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2019-01-08 14:05:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-01-08 14:05:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 760 transitions. [2019-01-08 14:05:33,582 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 760 transitions. Word has length 5 [2019-01-08 14:05:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:33,582 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 760 transitions. [2019-01-08 14:05:33,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-08 14:05:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 760 transitions. [2019-01-08 14:05:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:33,583 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:33,583 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:33,584 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 28831546, now seen corresponding path program 2 times [2019-01-08 14:05:33,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:33,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:33,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:33,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:33,586 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:33,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:33,685 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:33,686 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:05:33,686 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:05:33,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:33,686 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:33,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:05:33,697 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:05:33,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:05:33,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:05:33,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:33,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:33,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:33,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:33,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:33,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:33,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:33,957 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:33,987 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,015 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,043 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,071 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:34,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:34,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:34,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:34,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:34,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:34,122 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,159 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,179 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,196 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,210 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,222 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,268 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:34,268 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:34,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:05:34,302 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,347 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:34,347 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:34,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:05:34,382 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,441 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:34,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:05:34,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,479 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:34,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:05:34,481 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,532 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:34,533 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:05:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:34,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:34,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:34,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-08 14:05:34,598 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:34,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:05:34,599 INFO L87 Difference]: Start difference. First operand 128 states and 760 transitions. Second operand 10 states. [2019-01-08 14:05:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:35,326 INFO L93 Difference]: Finished difference Result 241 states and 1191 transitions. [2019-01-08 14:05:35,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:05:35,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:35,330 INFO L225 Difference]: With dead ends: 241 [2019-01-08 14:05:35,330 INFO L226 Difference]: Without dead ends: 235 [2019-01-08 14:05:35,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:05:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-01-08 14:05:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 164. [2019-01-08 14:05:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-01-08 14:05:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 1007 transitions. [2019-01-08 14:05:35,369 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 1007 transitions. Word has length 5 [2019-01-08 14:05:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:35,369 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 1007 transitions. [2019-01-08 14:05:35,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 1007 transitions. [2019-01-08 14:05:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:35,370 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:35,371 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:35,371 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash 28831858, now seen corresponding path program 1 times [2019-01-08 14:05:35,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:35,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:35,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:05:35,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:35,372 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:05:35,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:35,746 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:35,747 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:35,747 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [29] [2019-01-08 14:05:35,748 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:35,748 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:35,750 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:35,750 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:35,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:35,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:35,751 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:35,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:35,776 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:35,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:35,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:35,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:35,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:35,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:35,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:35,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:35,843 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,880 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,901 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,939 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,953 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,966 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:35,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:36,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:36,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:36,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:36,116 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,137 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,153 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,169 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,201 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:36,202 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:36,465 WARN L181 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-08 14:05:36,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-08 14:05:36,547 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:05:36,658 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:05:36,659 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:106 [2019-01-08 14:05:36,895 WARN L181 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-01-08 14:05:36,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,915 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:36,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2019-01-08 14:05:36,916 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2019-01-08 14:05:37,034 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2019-01-08 14:05:37,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-08 14:05:37,432 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:126, output treesize:280 [2019-01-08 14:05:39,814 WARN L181 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 171 DAG size of output: 90 [2019-01-08 14:05:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:39,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:39,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:39,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:39,906 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:39,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:39,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:39,907 INFO L87 Difference]: Start difference. First operand 164 states and 1007 transitions. Second operand 8 states. [2019-01-08 14:05:40,381 WARN L181 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-01-08 14:05:40,886 WARN L181 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-01-08 14:05:41,264 WARN L181 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-01-08 14:05:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:41,558 INFO L93 Difference]: Finished difference Result 208 states and 1150 transitions. [2019-01-08 14:05:41,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:41,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:05:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:41,562 INFO L225 Difference]: With dead ends: 208 [2019-01-08 14:05:41,562 INFO L226 Difference]: Without dead ends: 207 [2019-01-08 14:05:41,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-01-08 14:05:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2019-01-08 14:05:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-01-08 14:05:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 1128 transitions. [2019-01-08 14:05:41,606 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 1128 transitions. Word has length 5 [2019-01-08 14:05:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:41,606 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 1128 transitions. [2019-01-08 14:05:41,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 1128 transitions. [2019-01-08 14:05:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:41,607 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:41,607 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:41,608 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash 28818278, now seen corresponding path program 1 times [2019-01-08 14:05:41,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:41,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:41,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:41,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:41,609 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:41,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:41,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:41,706 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:41,707 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [27] [2019-01-08 14:05:41,708 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:41,708 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:41,710 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:41,710 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:41,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:41,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:41,711 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:41,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:41,719 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:41,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:41,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:41,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:41,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:41,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:41,880 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:41,898 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:41,915 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:41,932 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:41,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:41,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:41,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:41,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:41,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:41,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:41,977 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:42,002 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:42,022 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:42,039 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:42,052 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:42,065 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:42,097 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:42,098 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:42,360 WARN L181 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-08 14:05:42,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-08 14:05:42,388 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:05:42,528 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-01-08 14:05:42,528 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-01-08 14:05:42,786 WARN L181 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-01-08 14:05:42,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 103 [2019-01-08 14:05:42,824 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:05:42,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:42,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 89 [2019-01-08 14:05:42,993 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:43,077 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-08 14:05:43,078 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:129, output treesize:125 [2019-01-08 14:05:43,325 WARN L181 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-01-08 14:05:43,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,372 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:43,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 118 [2019-01-08 14:05:43,399 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-08 14:05:43,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,704 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:43,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-08 14:05:43,706 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:43,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:43,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 110 [2019-01-08 14:05:43,875 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:44,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-08 14:05:44,067 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:242 [2019-01-08 14:05:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:44,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:44,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:44,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:05:44,251 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:44,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:44,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:44,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:44,252 INFO L87 Difference]: Start difference. First operand 181 states and 1128 transitions. Second operand 10 states. [2019-01-08 14:05:45,246 WARN L181 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2019-01-08 14:05:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:45,825 INFO L93 Difference]: Finished difference Result 280 states and 1534 transitions. [2019-01-08 14:05:45,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:05:45,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:45,829 INFO L225 Difference]: With dead ends: 280 [2019-01-08 14:05:45,829 INFO L226 Difference]: Without dead ends: 279 [2019-01-08 14:05:45,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:05:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-01-08 14:05:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 185. [2019-01-08 14:05:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-01-08 14:05:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 1156 transitions. [2019-01-08 14:05:45,876 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 1156 transitions. Word has length 5 [2019-01-08 14:05:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:45,877 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 1156 transitions. [2019-01-08 14:05:45,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 1156 transitions. [2019-01-08 14:05:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:45,878 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:45,878 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:45,878 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:45,879 INFO L82 PathProgramCache]: Analyzing trace with hash 28835766, now seen corresponding path program 1 times [2019-01-08 14:05:45,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:45,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:45,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:45,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:45,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:46,267 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2019-01-08 14:05:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:05:46,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:05:46,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-08 14:05:46,268 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:46,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:05:46,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:05:46,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-08 14:05:46,269 INFO L87 Difference]: Start difference. First operand 185 states and 1156 transitions. Second operand 4 states. [2019-01-08 14:05:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:46,434 INFO L93 Difference]: Finished difference Result 201 states and 1179 transitions. [2019-01-08 14:05:46,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:05:46,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-08 14:05:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:46,438 INFO L225 Difference]: With dead ends: 201 [2019-01-08 14:05:46,438 INFO L226 Difference]: Without dead ends: 198 [2019-01-08 14:05:46,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-08 14:05:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-01-08 14:05:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2019-01-08 14:05:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-01-08 14:05:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 1164 transitions. [2019-01-08 14:05:46,484 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 1164 transitions. Word has length 5 [2019-01-08 14:05:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:46,485 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 1164 transitions. [2019-01-08 14:05:46,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:05:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 1164 transitions. [2019-01-08 14:05:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:46,486 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:46,486 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:46,486 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:46,487 INFO L82 PathProgramCache]: Analyzing trace with hash 28822248, now seen corresponding path program 1 times [2019-01-08 14:05:46,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:46,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:46,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:46,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:46,488 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:46,626 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-01-08 14:05:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:05:46,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:46,771 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:46,771 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:46,771 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [29] [2019-01-08 14:05:46,772 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:46,772 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:46,774 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:46,774 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:46,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:46,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:46,775 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:46,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:46,784 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:46,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:46,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:46,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:46,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:46,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:46,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:46,949 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:46,970 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:46,992 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,016 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:47,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:47,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:47,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:47,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:47,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:47,069 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,096 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,116 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,133 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,146 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,159 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:47,192 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:47,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:47,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:05:47,233 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,263 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:47,263 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:47,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:47,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:47,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:47,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:47,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:47,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:47,289 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:47,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:05:47,291 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:47,322 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:47,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-01-08 14:05:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:47,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:47,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:47,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:47,385 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:47,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:47,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:47,386 INFO L87 Difference]: Start difference. First operand 187 states and 1164 transitions. Second operand 8 states. [2019-01-08 14:05:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:47,799 INFO L93 Difference]: Finished difference Result 208 states and 1202 transitions. [2019-01-08 14:05:47,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:47,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:05:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:47,802 INFO L225 Difference]: With dead ends: 208 [2019-01-08 14:05:47,802 INFO L226 Difference]: Without dead ends: 207 [2019-01-08 14:05:47,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-01-08 14:05:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2019-01-08 14:05:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-01-08 14:05:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 1178 transitions. [2019-01-08 14:05:47,851 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 1178 transitions. Word has length 5 [2019-01-08 14:05:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:47,852 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 1178 transitions. [2019-01-08 14:05:47,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 1178 transitions. [2019-01-08 14:05:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:47,853 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:47,853 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:47,853 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash 29302748, now seen corresponding path program 1 times [2019-01-08 14:05:47,854 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:47,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:47,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:47,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:47,855 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:47,998 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-01-08 14:05:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:48,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:48,016 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:48,016 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:48,016 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [29] [2019-01-08 14:05:48,017 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:48,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:48,020 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:48,020 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:48,020 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:48,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:48,021 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:48,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:48,042 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:48,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:48,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:05:48,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:05:48,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:05:48,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:05:48,177 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,196 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,218 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,242 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:48,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:05:48,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:05:48,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:05:48,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:05:48,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:05:48,298 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,324 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,343 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,357 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,369 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,381 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,412 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:48,413 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:05:48,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-08 14:05:48,456 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,482 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:48,483 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-08 14:05:48,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:48,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-08 14:05:48,512 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:48,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:48,542 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:34 [2019-01-08 14:05:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:48,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:48,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:48,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:48,600 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:48,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:48,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:48,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:48,601 INFO L87 Difference]: Start difference. First operand 189 states and 1178 transitions. Second operand 8 states. [2019-01-08 14:05:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:48,913 INFO L93 Difference]: Finished difference Result 210 states and 1196 transitions. [2019-01-08 14:05:48,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:48,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:05:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:48,916 INFO L225 Difference]: With dead ends: 210 [2019-01-08 14:05:48,917 INFO L226 Difference]: Without dead ends: 208 [2019-01-08 14:05:48,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-01-08 14:05:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2019-01-08 14:05:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-01-08 14:05:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1179 transitions. [2019-01-08 14:05:48,952 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1179 transitions. Word has length 5 [2019-01-08 14:05:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:48,952 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1179 transitions. [2019-01-08 14:05:48,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1179 transitions. [2019-01-08 14:05:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:48,953 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:48,953 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:48,954 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash 29308202, now seen corresponding path program 2 times [2019-01-08 14:05:48,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:48,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:48,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:48,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:48,955 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:49,099 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:05:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:49,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:49,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:49,124 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:05:49,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:05:49,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:49,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:49,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:05:49,132 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:05:49,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:05:49,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:05:49,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:49,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:49,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:49,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:49,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:49,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:49,396 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,427 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,456 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,489 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,522 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:49,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:49,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:49,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:49,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:49,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:49,577 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,852 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,873 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,889 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,903 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,915 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:49,961 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:49,962 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:49,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:49,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:05:49,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:50,044 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:50,044 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:50,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:05:50,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:50,133 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:50,134 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:05:50,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:50,173 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:50,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2019-01-08 14:05:50,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:50,227 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:50,228 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:05:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:50,250 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:50,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:50,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:50,308 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:50,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:50,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:50,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:50,309 INFO L87 Difference]: Start difference. First operand 191 states and 1179 transitions. Second operand 10 states. [2019-01-08 14:05:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:52,012 INFO L93 Difference]: Finished difference Result 242 states and 1308 transitions. [2019-01-08 14:05:52,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:52,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:52,016 INFO L225 Difference]: With dead ends: 242 [2019-01-08 14:05:52,016 INFO L226 Difference]: Without dead ends: 240 [2019-01-08 14:05:52,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:05:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-01-08 14:05:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2019-01-08 14:05:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-01-08 14:05:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 1251 transitions. [2019-01-08 14:05:52,058 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 1251 transitions. Word has length 5 [2019-01-08 14:05:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:52,058 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 1251 transitions. [2019-01-08 14:05:52,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 1251 transitions. [2019-01-08 14:05:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:52,059 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:52,059 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:52,059 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 29307954, now seen corresponding path program 1 times [2019-01-08 14:05:52,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:52,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:52,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:05:52,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:52,061 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:52,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:52,195 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:52,195 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:52,196 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [27] [2019-01-08 14:05:52,199 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:52,199 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:52,201 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:52,202 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:52,202 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:52,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:52,202 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:52,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:52,211 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:52,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:52,245 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 21 treesize of output 24 [2019-01-08 14:05:52,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:52,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:52,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:52,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:52,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:05:52,283 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,325 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,348 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,366 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,381 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,396 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:05:52,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:05:52,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:05:52,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:05:52,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:05:52,665 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,695 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,720 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,760 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,784 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,860 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:52,861 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:05:52,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:05:52,897 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:52,949 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:52,950 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:05:52,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:52,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:05:52,994 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:53,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:53,049 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:05:53,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:53,088 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:53,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2019-01-08 14:05:53,089 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:53,143 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:53,144 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:05:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:53,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:53,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:53,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:53,226 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:53,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:53,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:53,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:53,227 INFO L87 Difference]: Start difference. First operand 202 states and 1251 transitions. Second operand 10 states. [2019-01-08 14:05:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:53,836 INFO L93 Difference]: Finished difference Result 249 states and 1369 transitions. [2019-01-08 14:05:53,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:53,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:53,840 INFO L225 Difference]: With dead ends: 249 [2019-01-08 14:05:53,840 INFO L226 Difference]: Without dead ends: 247 [2019-01-08 14:05:53,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:05:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-01-08 14:05:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2019-01-08 14:05:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-01-08 14:05:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 1326 transitions. [2019-01-08 14:05:53,878 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 1326 transitions. Word has length 5 [2019-01-08 14:05:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:53,878 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 1326 transitions. [2019-01-08 14:05:53,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 1326 transitions. [2019-01-08 14:05:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:53,879 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:53,879 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:53,879 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash 29294624, now seen corresponding path program 1 times [2019-01-08 14:05:53,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:53,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:53,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:53,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:53,881 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:54,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:54,059 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:54,059 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:54,059 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [27] [2019-01-08 14:05:54,063 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:54,063 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:54,065 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:54,065 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:05:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:54,065 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:54,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:54,066 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:54,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:54,074 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:54,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:54,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:54,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:05:54,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:05:54,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:05:54,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:05:54,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:05:54,129 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,160 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,181 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,200 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,215 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,228 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:05:54,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:05:54,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:05:54,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:54,383 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,400 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,416 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,433 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,465 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:54,466 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:05:54,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:05:54,523 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:54,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-08 14:05:54,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-08 14:05:54,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,623 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:54,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-01-08 14:05:54,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,661 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:54,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-08 14:05:54,663 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:54,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:54,697 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-08 14:05:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:54,716 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:54,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:54,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:05:54,776 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:54,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:05:54,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:05:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:05:54,777 INFO L87 Difference]: Start difference. First operand 212 states and 1326 transitions. Second operand 10 states. [2019-01-08 14:05:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:55,344 INFO L93 Difference]: Finished difference Result 260 states and 1437 transitions. [2019-01-08 14:05:55,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:05:55,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:05:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:55,348 INFO L225 Difference]: With dead ends: 260 [2019-01-08 14:05:55,348 INFO L226 Difference]: Without dead ends: 258 [2019-01-08 14:05:55,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:05:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-01-08 14:05:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2019-01-08 14:05:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-08 14:05:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-01-08 14:05:55,384 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-01-08 14:05:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:55,385 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-01-08 14:05:55,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:05:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-01-08 14:05:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:55,386 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:55,386 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:55,386 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash 29298904, now seen corresponding path program 1 times [2019-01-08 14:05:55,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:55,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:55,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:55,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:55,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:55,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:55,530 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:55,531 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:55,531 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [29] [2019-01-08 14:05:55,533 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:55,533 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:55,535 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:55,535 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:55,536 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:55,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:55,536 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:55,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:55,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:55,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:55,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:55,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:05:55,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:05:55,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:05:55,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:05:55,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:05:55,635 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,676 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,699 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,715 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,729 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,743 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:05:55,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:05:55,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:05:55,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:05:55,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:05:55,982 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,006 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,031 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,055 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,082 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,127 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:56,127 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:05:56,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-08 14:05:56,156 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,199 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:56,200 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-08 14:05:56,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,231 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:56,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 101 [2019-01-08 14:05:56,232 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,276 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:56,277 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:55 [2019-01-08 14:05:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:56,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:56,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:56,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:56,360 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:56,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:56,361 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-01-08 14:05:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:56,673 INFO L93 Difference]: Finished difference Result 244 states and 1417 transitions. [2019-01-08 14:05:56,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:56,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:05:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:56,677 INFO L225 Difference]: With dead ends: 244 [2019-01-08 14:05:56,677 INFO L226 Difference]: Without dead ends: 243 [2019-01-08 14:05:56,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-01-08 14:05:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2019-01-08 14:05:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-08 14:05:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-01-08 14:05:56,726 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-01-08 14:05:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:56,726 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-01-08 14:05:56,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-01-08 14:05:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:05:56,727 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:56,728 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:05:56,728 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash 29366174, now seen corresponding path program 1 times [2019-01-08 14:05:56,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:56,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:56,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:56,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:56,729 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:56,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:56,836 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:56,836 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:05:56,837 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [28], [29] [2019-01-08 14:05:56,839 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:56,839 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:56,841 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:56,841 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:56,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:56,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:56,842 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:56,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:56,852 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:56,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:56,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:05:56,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:05:56,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:05:56,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:05:56,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:05:56,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:05:56,910 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,938 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,960 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,977 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,989 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,002 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:05:57,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:05:57,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:05:57,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:05:57,128 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,143 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,158 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,174 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,204 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:57,204 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:05:57,421 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-08 14:05:57,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:05:57,484 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-08 14:05:57,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-01-08 14:05:57,852 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:389 [2019-01-08 14:05:58,135 WARN L181 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 82 [2019-01-08 14:05:58,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2019-01-08 14:05:58,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:58,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 71 [2019-01-08 14:05:58,255 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:58,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:58,338 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:58,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 80 [2019-01-08 14:05:58,339 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:58,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-08 14:05:58,403 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:178, output treesize:126 [2019-01-08 14:05:58,538 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-01-08 14:05:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:58,542 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:58,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:58,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:58,600 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:58,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:58,600 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-01-08 14:05:59,032 WARN L181 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-01-08 14:05:59,389 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-01-08 14:06:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:09,970 INFO L93 Difference]: Finished difference Result 273 states and 1446 transitions. [2019-01-08 14:06:09,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:06:09,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:06:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:09,974 INFO L225 Difference]: With dead ends: 273 [2019-01-08 14:06:09,974 INFO L226 Difference]: Without dead ends: 272 [2019-01-08 14:06:09,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:06:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-01-08 14:06:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2019-01-08 14:06:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-01-08 14:06:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 1396 transitions. [2019-01-08 14:06:10,011 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 1396 transitions. Word has length 5 [2019-01-08 14:06:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:10,011 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 1396 transitions. [2019-01-08 14:06:10,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 1396 transitions. [2019-01-08 14:06:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:06:10,012 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:10,012 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:06:10,012 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash 29353958, now seen corresponding path program 2 times [2019-01-08 14:06:10,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:10,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:10,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:10,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:10,013 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:10,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:10,123 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:10,123 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:06:10,123 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:06:10,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:10,123 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:10,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:06:10,132 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:06:10,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:06:10,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:06:10,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:10,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:10,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:10,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:10,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:10,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:10,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:10,208 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,250 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,274 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,293 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,307 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,321 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:06:10,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:10,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:10,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:10,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:10,580 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,606 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,632 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,659 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,686 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,731 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. [2019-01-08 14:06:10,732 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:10,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:06:10,762 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:10,811 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:10,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,845 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:10,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-08 14:06:10,846 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,896 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:10,897 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-08 14:06:10,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-08 14:06:10,933 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:10,981 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:10,981 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-08 14:06:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:11,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:11,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:11,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:06:11,047 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:11,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:11,048 INFO L87 Difference]: Start difference. First operand 222 states and 1396 transitions. Second operand 10 states. [2019-01-08 14:06:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:11,810 INFO L93 Difference]: Finished difference Result 274 states and 1519 transitions. [2019-01-08 14:06:11,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:06:11,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:06:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:11,814 INFO L225 Difference]: With dead ends: 274 [2019-01-08 14:06:11,814 INFO L226 Difference]: Without dead ends: 273 [2019-01-08 14:06:11,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:06:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-01-08 14:06:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 225. [2019-01-08 14:06:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-08 14:06:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-01-08 14:06:11,861 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-01-08 14:06:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:11,862 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-01-08 14:06:11,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-01-08 14:06:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:06:11,862 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:11,862 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:06:11,863 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 29372004, now seen corresponding path program 1 times [2019-01-08 14:06:11,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:11,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:11,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:06:11,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:11,864 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:11,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:11,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:11,942 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:06:11,942 INFO L207 CegarAbsIntRunner]: [0], [24], [28], [30], [31] [2019-01-08 14:06:11,943 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:11,943 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:11,946 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:11,946 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:06:11,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:11,946 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:11,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:11,946 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:11,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:11,956 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:11,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:11,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:06:11,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:06:12,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:06:12,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:06:12,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:06:12,154 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,180 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,206 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,232 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,260 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:12,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:12,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:12,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:12,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:12,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:06:12,316 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,349 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,368 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,384 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,396 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,409 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:12,454 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2019-01-08 14:06:12,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-08 14:06:12,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:12,523 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:97, output treesize:67 [2019-01-08 14:06:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:12,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:12,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:12,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:06:12,567 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:12,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:06:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:06:12,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:06:12,568 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 6 states. [2019-01-08 14:06:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:12,782 INFO L93 Difference]: Finished difference Result 242 states and 1433 transitions. [2019-01-08 14:06:12,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:06:12,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-08 14:06:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:12,786 INFO L225 Difference]: With dead ends: 242 [2019-01-08 14:06:12,786 INFO L226 Difference]: Without dead ends: 241 [2019-01-08 14:06:12,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:06:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-01-08 14:06:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2019-01-08 14:06:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-08 14:06:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-01-08 14:06:12,837 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-01-08 14:06:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:12,837 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-01-08 14:06:12,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:06:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-01-08 14:06:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:06:12,838 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:12,838 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:06:12,839 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash 29357926, now seen corresponding path program 1 times [2019-01-08 14:06:12,839 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:12,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:12,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:12,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:12,840 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:13,189 WARN L181 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2019-01-08 14:06:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:13,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:13,226 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:13,226 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:06:13,226 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [24], [27] [2019-01-08 14:06:13,227 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:13,227 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:13,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:13,230 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:13,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:13,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:13,231 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:13,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:13,240 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:13,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:13,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,270 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:06:13,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:13,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:13,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:13,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:13,498 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,529 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,560 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,592 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,622 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:13,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:13,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:13,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:13,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:13,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:13,682 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,735 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,756 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,772 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,786 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,798 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,844 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:13,845 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:13,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:06:13,881 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,928 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:13,928 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:13,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:06:13,964 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:14,015 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:14,016 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:06:14,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,053 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:14,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 128 [2019-01-08 14:06:14,055 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:14,105 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:14,106 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:06:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:14,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:14,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:14,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:06:14,200 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:14,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:14,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:14,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:14,200 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 10 states. [2019-01-08 14:06:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:14,851 INFO L93 Difference]: Finished difference Result 276 states and 1527 transitions. [2019-01-08 14:06:14,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:14,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:06:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:14,855 INFO L225 Difference]: With dead ends: 276 [2019-01-08 14:06:14,855 INFO L226 Difference]: Without dead ends: 274 [2019-01-08 14:06:14,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:06:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-01-08 14:06:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 234. [2019-01-08 14:06:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-01-08 14:06:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 1480 transitions. [2019-01-08 14:06:14,906 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 1480 transitions. Word has length 5 [2019-01-08 14:06:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:14,907 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 1480 transitions. [2019-01-08 14:06:14,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 1480 transitions. [2019-01-08 14:06:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:06:14,907 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:14,908 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:06:14,908 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash 28933724, now seen corresponding path program 1 times [2019-01-08 14:06:14,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:14,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:14,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:14,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:14,909 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:15,121 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2019-01-08 14:06:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:15,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:15,132 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:15,132 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:06:15,132 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [29] [2019-01-08 14:06:15,134 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:15,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:15,136 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:15,136 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:15,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:15,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:15,137 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:15,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:15,145 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:15,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:15,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:06:15,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:06:15,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:06:15,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:15,288 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,306 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,323 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,340 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:15,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:15,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:15,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:15,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:15,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:06:15,386 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,411 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,432 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,448 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,461 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,473 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,507 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:15,507 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-08 14:06:15,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:06:15,540 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:15,571 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:06:15,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:15,692 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-01-08 14:06:15,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:06:15,693 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:15,724 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:15,724 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-08 14:06:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:15,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:15,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:15,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:15,777 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:15,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:15,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:15,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:15,778 INFO L87 Difference]: Start difference. First operand 234 states and 1480 transitions. Second operand 8 states. [2019-01-08 14:06:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:16,174 INFO L93 Difference]: Finished difference Result 288 states and 1635 transitions. [2019-01-08 14:06:16,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:16,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:06:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:16,177 INFO L225 Difference]: With dead ends: 288 [2019-01-08 14:06:16,177 INFO L226 Difference]: Without dead ends: 287 [2019-01-08 14:06:16,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:06:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-01-08 14:06:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2019-01-08 14:06:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-01-08 14:06:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 1595 transitions. [2019-01-08 14:06:16,237 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 1595 transitions. Word has length 5 [2019-01-08 14:06:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:16,237 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 1595 transitions. [2019-01-08 14:06:16,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 1595 transitions. [2019-01-08 14:06:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:06:16,238 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:16,238 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:06:16,238 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:16,238 INFO L82 PathProgramCache]: Analyzing trace with hash 28941412, now seen corresponding path program 1 times [2019-01-08 14:06:16,238 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:16,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:16,239 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:16,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:16,398 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:16,398 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:06:16,398 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [28], [29] [2019-01-08 14:06:16,400 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:16,400 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:16,402 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:16,402 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:16,403 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:16,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:16,403 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:16,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:16,412 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:16,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:16,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:16,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:16,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:16,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:16,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:16,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:06:16,465 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,493 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,513 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,530 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,543 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,556 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:06:16,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:06:16,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:06:16,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:06:16,680 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,696 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,711 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,728 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,759 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:16,759 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-08 14:06:16,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:06:16,802 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:06:16,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:06:16,898 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2019-01-08 14:06:16,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:16,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-08 14:06:16,936 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:16,959 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. [2019-01-08 14:06:16,959 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:27 [2019-01-08 14:06:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:16,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:17,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:17,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:06:17,006 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:17,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:06:17,006 INFO L87 Difference]: Start difference. First operand 250 states and 1595 transitions. Second operand 8 states. [2019-01-08 14:06:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:17,406 INFO L93 Difference]: Finished difference Result 319 states and 1823 transitions. [2019-01-08 14:06:17,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:06:17,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:06:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:17,411 INFO L225 Difference]: With dead ends: 319 [2019-01-08 14:06:17,411 INFO L226 Difference]: Without dead ends: 318 [2019-01-08 14:06:17,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-01-08 14:06:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2019-01-08 14:06:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-01-08 14:06:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-01-08 14:06:17,471 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 5 [2019-01-08 14:06:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:17,471 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-01-08 14:06:17,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-01-08 14:06:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:17,473 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:17,473 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:06:17,473 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash 904691166, now seen corresponding path program 1 times [2019-01-08 14:06:17,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:17,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:17,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:17,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:17,474 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:17,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:17,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:17,650 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:17,650 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [30], [31] [2019-01-08 14:06:17,651 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:17,651 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:17,653 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:17,653 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 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 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:06:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:17,653 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:17,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:17,653 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:17,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:17,669 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:17,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:17,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:06:17,847 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-01-08 14:06:17,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:06:17,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:06:17,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:06:17,987 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,006 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,029 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,052 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:18,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:18,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:18,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:18,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:18,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:06:18,110 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,133 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,152 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,167 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,179 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,191 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,222 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:18,223 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-08 14:06:18,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-08 14:06:18,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:18,304 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-08 14:06:18,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 74 [2019-01-08 14:06:18,331 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,360 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:18,361 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:46 [2019-01-08 14:06:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:18,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:18,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:18,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-08 14:06:18,417 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:18,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-08 14:06:18,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-08 14:06:18,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:06:18,418 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 7 states. [2019-01-08 14:06:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:18,669 INFO L93 Difference]: Finished difference Result 290 states and 1801 transitions. [2019-01-08 14:06:18,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:18,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-01-08 14:06:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:18,673 INFO L225 Difference]: With dead ends: 290 [2019-01-08 14:06:18,673 INFO L226 Difference]: Without dead ends: 289 [2019-01-08 14:06:18,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-01-08 14:06:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 276. [2019-01-08 14:06:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-01-08 14:06:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-01-08 14:06:18,743 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 6 [2019-01-08 14:06:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:18,743 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-01-08 14:06:18,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-08 14:06:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-01-08 14:06:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:18,744 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:18,744 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-01-08 14:06:18,744 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash 904323688, now seen corresponding path program 3 times [2019-01-08 14:06:18,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:18,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:18,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:18,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:18,746 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:18,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:18,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:18,837 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:06:18,837 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:06:18,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:18,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:18,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:06:18,849 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:06:18,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:06:18,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:06:18,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:18,875 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 21 treesize of output 24 [2019-01-08 14:06:18,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:18,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:18,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:18,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:18,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:06:18,930 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,958 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,981 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,000 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,015 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,028 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:06:19,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,092 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 41 treesize of output 53 [2019-01-08 14:06:19,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,130 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:06:19,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:19,225 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,280 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,296 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,312 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,344 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,344 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-08 14:06:19,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:06:19,388 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,415 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,415 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:06:19,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:06:19,439 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,472 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,473 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-08 14:06:19,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-08 14:06:19,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,542 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,543 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:38 [2019-01-08 14:06:19,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-08 14:06:19,578 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,617 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,617 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:38 [2019-01-08 14:06:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:19,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:19,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:19,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-01-08 14:06:19,687 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:19,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:06:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:06:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:06:19,688 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 11 states. [2019-01-08 14:06:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:20,338 INFO L93 Difference]: Finished difference Result 423 states and 2543 transitions. [2019-01-08 14:06:20,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:06:20,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:06:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:20,343 INFO L225 Difference]: With dead ends: 423 [2019-01-08 14:06:20,343 INFO L226 Difference]: Without dead ends: 421 [2019-01-08 14:06:20,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:06:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-01-08 14:06:20,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 325. [2019-01-08 14:06:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2019-01-08 14:06:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 2130 transitions. [2019-01-08 14:06:20,487 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 2130 transitions. Word has length 6 [2019-01-08 14:06:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:20,487 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 2130 transitions. [2019-01-08 14:06:20,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:06:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 2130 transitions. [2019-01-08 14:06:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:20,488 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:20,489 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:20,489 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 904327844, now seen corresponding path program 1 times [2019-01-08 14:06:20,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:20,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:20,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:06:20,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:20,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:20,649 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:06:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:21,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:21,039 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:21,039 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:21,040 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [28], [29] [2019-01-08 14:06:21,040 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:21,040 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:21,042 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:21,042 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:21,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:21,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:21,043 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:21,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:21,065 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:21,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:21,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:21,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:21,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:21,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:21,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:21,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,250 INFO L303 Elim1Store]: Index analysis took 119 ms [2019-01-08 14:06:21,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:21,252 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,295 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,316 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,335 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,350 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,362 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:06:21,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:21,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:21,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:21,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:21,608 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,633 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,659 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,686 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,712 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,758 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:21,759 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:21,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:06:21,795 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,840 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:21,841 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:21,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:06:21,875 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:21,926 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:21,926 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:06:21,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,971 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:21,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-08 14:06:21,973 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:22,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:06:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:22,060 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:22,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:22,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:06:22,228 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:22,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:22,229 INFO L87 Difference]: Start difference. First operand 325 states and 2130 transitions. Second operand 10 states. [2019-01-08 14:06:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:22,866 INFO L93 Difference]: Finished difference Result 368 states and 2210 transitions. [2019-01-08 14:06:22,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:22,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:06:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:22,870 INFO L225 Difference]: With dead ends: 368 [2019-01-08 14:06:22,871 INFO L226 Difference]: Without dead ends: 366 [2019-01-08 14:06:22,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:06:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-01-08 14:06:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 329. [2019-01-08 14:06:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-01-08 14:06:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 2135 transitions. [2019-01-08 14:06:22,946 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 2135 transitions. Word has length 6 [2019-01-08 14:06:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:22,946 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 2135 transitions. [2019-01-08 14:06:22,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 2135 transitions. [2019-01-08 14:06:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:22,948 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:22,948 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:06:22,948 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 904329640, now seen corresponding path program 3 times [2019-01-08 14:06:22,949 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:22,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:22,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:22,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:22,949 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:23,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:23,012 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:23,012 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:06:23,012 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:06:23,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:23,013 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:23,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:06:23,023 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:06:23,028 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:06:23,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:06:23,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:23,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:23,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:23,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:23,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:23,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:23,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:23,097 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,138 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,161 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,179 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,195 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,209 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,245 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 68 treesize of output 71 [2019-01-08 14:06:23,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:23,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:23,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:23,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:23,502 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,527 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,555 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,590 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,622 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,672 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:23,672 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:23,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:06:23,704 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,748 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:23,749 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:23,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:06:23,784 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,834 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:23,835 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:06:23,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,867 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:23,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:06:23,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:23,921 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:23,922 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:06:23,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:23,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 135 [2019-01-08 14:06:23,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,025 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:24,025 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:45 [2019-01-08 14:06:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:24,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:24,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:24,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:06:24,114 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:24,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:06:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:06:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:06:24,114 INFO L87 Difference]: Start difference. First operand 329 states and 2135 transitions. Second operand 11 states. [2019-01-08 14:06:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:24,911 INFO L93 Difference]: Finished difference Result 407 states and 2353 transitions. [2019-01-08 14:06:24,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:06:24,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:06:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:24,916 INFO L225 Difference]: With dead ends: 407 [2019-01-08 14:06:24,916 INFO L226 Difference]: Without dead ends: 401 [2019-01-08 14:06:24,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:06:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-01-08 14:06:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 341. [2019-01-08 14:06:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-01-08 14:06:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 2222 transitions. [2019-01-08 14:06:25,001 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 2222 transitions. Word has length 6 [2019-01-08 14:06:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:25,001 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 2222 transitions. [2019-01-08 14:06:25,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:06:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 2222 transitions. [2019-01-08 14:06:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:25,002 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:25,002 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:25,003 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:25,003 INFO L82 PathProgramCache]: Analyzing trace with hash 904329206, now seen corresponding path program 1 times [2019-01-08 14:06:25,003 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:25,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:25,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:06:25,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:25,004 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:25,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:25,154 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:25,154 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:25,154 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [27] [2019-01-08 14:06:25,155 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:25,156 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:25,158 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:25,158 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:06:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:25,159 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:25,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:25,159 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:25,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:25,167 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:25,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:25,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:25,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:25,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:25,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:25,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:25,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:25,252 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,291 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,314 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,331 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,345 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,359 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:06:25,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:25,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:25,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:25,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:25,602 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,628 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,653 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,679 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,704 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,750 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:25,750 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:25,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:06:25,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,827 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. [2019-01-08 14:06:25,828 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:25,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:06:25,865 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,913 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:25,914 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:06:25,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,955 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:25,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:06:25,958 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:26,014 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:26,014 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:06:26,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,050 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:26,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:26,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-08 14:06:26,052 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:26,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:26,104 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-08 14:06:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:26,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:26,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:26,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:06:26,195 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:26,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:06:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:06:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:06:26,196 INFO L87 Difference]: Start difference. First operand 341 states and 2222 transitions. Second operand 12 states. [2019-01-08 14:06:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:29,060 INFO L93 Difference]: Finished difference Result 645 states and 3901 transitions. [2019-01-08 14:06:29,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-01-08 14:06:29,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:06:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:29,067 INFO L225 Difference]: With dead ends: 645 [2019-01-08 14:06:29,067 INFO L226 Difference]: Without dead ends: 643 [2019-01-08 14:06:29,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-01-08 14:06:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-01-08 14:06:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 463. [2019-01-08 14:06:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-01-08 14:06:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 3101 transitions. [2019-01-08 14:06:29,175 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 3101 transitions. Word has length 6 [2019-01-08 14:06:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:29,176 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 3101 transitions. [2019-01-08 14:06:29,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:06:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 3101 transitions. [2019-01-08 14:06:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:29,177 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:29,177 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:29,178 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash 904333674, now seen corresponding path program 1 times [2019-01-08 14:06:29,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:29,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:29,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:29,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:29,179 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:29,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:29,300 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:29,300 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:29,300 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [30], [31] [2019-01-08 14:06:29,301 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:29,301 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:29,306 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:29,306 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:29,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:29,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:29,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:29,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:29,323 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:29,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:29,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:29,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:29,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:29,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:29,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:29,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:06:29,438 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,465 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,487 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,503 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,517 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,530 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:06:29,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:06:29,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:06:29,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:06:29,653 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,668 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,683 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,698 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,729 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:29,730 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:06:29,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-08 14:06:29,774 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,801 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:29,802 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-08 14:06:29,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:06:29,842 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:06:29,940 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:06:29,941 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:68 [2019-01-08 14:06:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:29,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:30,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:30,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-08 14:06:30,026 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:30,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:06:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:06:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:30,027 INFO L87 Difference]: Start difference. First operand 463 states and 3101 transitions. Second operand 9 states. [2019-01-08 14:06:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:30,593 INFO L93 Difference]: Finished difference Result 527 states and 3325 transitions. [2019-01-08 14:06:30,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:06:30,593 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:06:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:30,600 INFO L225 Difference]: With dead ends: 527 [2019-01-08 14:06:30,600 INFO L226 Difference]: Without dead ends: 524 [2019-01-08 14:06:30,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:06:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2019-01-08 14:06:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 487. [2019-01-08 14:06:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2019-01-08 14:06:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 3268 transitions. [2019-01-08 14:06:30,725 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 3268 transitions. Word has length 6 [2019-01-08 14:06:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:30,725 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 3268 transitions. [2019-01-08 14:06:30,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:06:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 3268 transitions. [2019-01-08 14:06:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:30,726 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:30,726 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:30,726 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash 904320156, now seen corresponding path program 1 times [2019-01-08 14:06:30,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:30,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:30,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:30,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:30,727 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:30,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:30,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:30,816 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:30,816 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [28], [29] [2019-01-08 14:06:30,818 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:30,818 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:30,821 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:30,821 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:30,822 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:30,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:30,822 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:30,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:30,832 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:30,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:30,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:30,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:30,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:30,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:30,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:30,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:06:30,907 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:30,936 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:30,959 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:30,977 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:30,992 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,006 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:06:31,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:06:31,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:06:31,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:31,159 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,176 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,192 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,208 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,241 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:31,242 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:06:31,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:06:31,295 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:31,324 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-08 14:06:31,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:06:31,359 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,393 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:31,394 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-08 14:06:31,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,482 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:31,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 104 [2019-01-08 14:06:31,484 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:31,522 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-08 14:06:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:31,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:31,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:31,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:06:31,606 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:31,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:31,606 INFO L87 Difference]: Start difference. First operand 487 states and 3268 transitions. Second operand 10 states. [2019-01-08 14:06:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:32,251 INFO L93 Difference]: Finished difference Result 534 states and 3436 transitions. [2019-01-08 14:06:32,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:32,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:06:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:32,259 INFO L225 Difference]: With dead ends: 534 [2019-01-08 14:06:32,259 INFO L226 Difference]: Without dead ends: 533 [2019-01-08 14:06:32,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:06:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2019-01-08 14:06:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 505. [2019-01-08 14:06:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-01-08 14:06:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 3394 transitions. [2019-01-08 14:06:32,399 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 3394 transitions. Word has length 6 [2019-01-08 14:06:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:32,399 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 3394 transitions. [2019-01-08 14:06:32,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 3394 transitions. [2019-01-08 14:06:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:32,401 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:32,401 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:32,401 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash 904806422, now seen corresponding path program 1 times [2019-01-08 14:06:32,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:32,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:32,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:32,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:32,403 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:32,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:32,462 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:32,462 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:32,462 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [28], [29] [2019-01-08 14:06:32,462 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:32,463 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:32,465 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:32,465 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:32,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:32,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:32,466 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:32,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:32,476 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:32,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:32,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:32,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:32,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:32,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:32,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:32,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:06:32,536 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,576 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,599 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,617 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,631 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,645 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:06:32,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:06:32,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:06:32,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,792 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:06:32,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:06:32,865 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,892 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,917 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,942 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,969 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:33,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:33,013 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:06:33,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:06:33,085 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:33,125 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:33,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-08 14:06:33,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2019-01-08 14:06:33,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:33,206 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:33,206 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-08 14:06:33,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,246 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:33,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 114 [2019-01-08 14:06:33,249 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:33,295 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:33,296 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2019-01-08 14:06:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:33,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:33,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:33,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:06:33,378 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:33,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:33,379 INFO L87 Difference]: Start difference. First operand 505 states and 3394 transitions. Second operand 10 states. [2019-01-08 14:06:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:34,039 INFO L93 Difference]: Finished difference Result 543 states and 3439 transitions. [2019-01-08 14:06:34,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:34,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:06:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:34,045 INFO L225 Difference]: With dead ends: 543 [2019-01-08 14:06:34,045 INFO L226 Difference]: Without dead ends: 542 [2019-01-08 14:06:34,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:06:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-01-08 14:06:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 500. [2019-01-08 14:06:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-01-08 14:06:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3359 transitions. [2019-01-08 14:06:34,194 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3359 transitions. Word has length 6 [2019-01-08 14:06:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:34,194 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3359 transitions. [2019-01-08 14:06:34,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3359 transitions. [2019-01-08 14:06:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:34,195 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:34,196 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:34,196 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:34,196 INFO L82 PathProgramCache]: Analyzing trace with hash 904796812, now seen corresponding path program 1 times [2019-01-08 14:06:34,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:34,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:34,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:34,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:34,197 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:34,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:34,284 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:34,284 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:34,284 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [28], [29] [2019-01-08 14:06:34,285 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:34,285 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:34,287 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:34,287 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:34,287 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:34,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:34,287 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:34,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:34,297 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:34,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:34,309 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 21 treesize of output 24 [2019-01-08 14:06:34,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:34,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:34,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:34,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:34,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:06:34,350 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,389 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,409 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,426 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,440 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,454 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,482 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 63 treesize of output 56 [2019-01-08 14:06:34,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:06:34,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:06:34,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:06:34,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:06:34,673 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,696 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,721 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,745 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,772 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,816 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:34,817 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:06:34,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:06:34,853 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,895 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:34,896 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-08 14:06:34,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:34,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2019-01-08 14:06:34,934 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:34,977 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:34,977 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-08 14:06:35,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,018 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:35,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-08 14:06:35,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:35,068 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:35,068 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-01-08 14:06:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:35,092 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:35,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:35,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:06:35,149 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:35,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:35,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:35,150 INFO L87 Difference]: Start difference. First operand 500 states and 3359 transitions. Second operand 10 states. [2019-01-08 14:06:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:35,840 INFO L93 Difference]: Finished difference Result 537 states and 3427 transitions. [2019-01-08 14:06:35,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:35,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:06:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:35,846 INFO L225 Difference]: With dead ends: 537 [2019-01-08 14:06:35,846 INFO L226 Difference]: Without dead ends: 536 [2019-01-08 14:06:35,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:06:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2019-01-08 14:06:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2019-01-08 14:06:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2019-01-08 14:06:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 3366 transitions. [2019-01-08 14:06:35,985 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 3366 transitions. Word has length 6 [2019-01-08 14:06:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:35,986 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 3366 transitions. [2019-01-08 14:06:35,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 3366 transitions. [2019-01-08 14:06:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:35,987 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:35,987 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:35,987 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 904848706, now seen corresponding path program 1 times [2019-01-08 14:06:35,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:35,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:35,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:35,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:35,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:36,391 WARN L181 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-01-08 14:06:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:36,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:36,555 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:36,556 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:36,556 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [29] [2019-01-08 14:06:36,559 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:36,559 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:36,561 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:36,561 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:36,561 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:36,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:36,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:36,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:36,585 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:36,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:36,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:36,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:36,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:36,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:36,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:36,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:36,681 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,723 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,746 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,765 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,781 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,794 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:06:36,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:36,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:36,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:37,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:37,038 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,064 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,090 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,115 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,142 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,188 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:37,189 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:37,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:06:37,228 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:37,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:37,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,308 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:37,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:06:37,309 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,355 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:37,356 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-08 14:06:37,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-08 14:06:37,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:37,441 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:37,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-08 14:06:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:37,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:37,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:37,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:06:37,525 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:37,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:37,526 INFO L87 Difference]: Start difference. First operand 501 states and 3366 transitions. Second operand 10 states. [2019-01-08 14:06:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:38,249 INFO L93 Difference]: Finished difference Result 588 states and 3737 transitions. [2019-01-08 14:06:38,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:38,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:06:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:38,254 INFO L225 Difference]: With dead ends: 588 [2019-01-08 14:06:38,254 INFO L226 Difference]: Without dead ends: 587 [2019-01-08 14:06:38,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:06:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-01-08 14:06:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 534. [2019-01-08 14:06:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2019-01-08 14:06:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 3605 transitions. [2019-01-08 14:06:38,403 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 3605 transitions. Word has length 6 [2019-01-08 14:06:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:38,403 INFO L480 AbstractCegarLoop]: Abstraction has 534 states and 3605 transitions. [2019-01-08 14:06:38,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 3605 transitions. [2019-01-08 14:06:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:38,404 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:38,404 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:38,405 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash 904869912, now seen corresponding path program 1 times [2019-01-08 14:06:38,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:38,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:38,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:38,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:38,406 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:38,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:38,473 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:38,474 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:38,474 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [28], [30], [31] [2019-01-08 14:06:38,476 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:38,476 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:38,478 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:38,478 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:38,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:38,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:38,479 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:38,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:38,495 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:38,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:38,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:38,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:38,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:38,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:38,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,656 INFO L303 Elim1Store]: Index analysis took 129 ms [2019-01-08 14:06:38,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:38,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:38,772 INFO L303 Elim1Store]: Index analysis took 113 ms [2019-01-08 14:06:38,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:06:38,773 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:38,976 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:38,996 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,014 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,026 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,040 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:06:39,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:06:39,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:06:39,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:06:39,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:06:39,258 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,282 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,306 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,331 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,358 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:39,402 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:06:39,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:06:39,431 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,473 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:39,473 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-08 14:06:39,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:39,507 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:39,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2019-01-08 14:06:39,508 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:39,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:39,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:55 [2019-01-08 14:06:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:39,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:39,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:39,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:39,617 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:39,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:39,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:39,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:39,617 INFO L87 Difference]: Start difference. First operand 534 states and 3605 transitions. Second operand 8 states. [2019-01-08 14:06:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:40,131 INFO L93 Difference]: Finished difference Result 558 states and 3635 transitions. [2019-01-08 14:06:40,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:40,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:06:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:40,135 INFO L225 Difference]: With dead ends: 558 [2019-01-08 14:06:40,135 INFO L226 Difference]: Without dead ends: 557 [2019-01-08 14:06:40,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-01-08 14:06:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 533. [2019-01-08 14:06:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2019-01-08 14:06:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 3598 transitions. [2019-01-08 14:06:40,267 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 3598 transitions. Word has length 6 [2019-01-08 14:06:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:40,268 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 3598 transitions. [2019-01-08 14:06:40,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 3598 transitions. [2019-01-08 14:06:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:40,269 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:40,269 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:40,269 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash 904431632, now seen corresponding path program 1 times [2019-01-08 14:06:40,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:40,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:40,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:40,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:40,271 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:40,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:40,351 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:40,351 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:40,351 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [29] [2019-01-08 14:06:40,352 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:40,352 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:40,354 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:40,354 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:40,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:40,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:40,354 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:40,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:40,367 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:40,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:40,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:06:40,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:06:40,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:06:40,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:40,535 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,552 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,568 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,584 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:40,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:40,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:40,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:40,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:40,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:06:40,628 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,653 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,672 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,687 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,700 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,711 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,743 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:40,744 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:06:40,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:06:40,782 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,816 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:40,817 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:06:40,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,842 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:40,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-08 14:06:40,844 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:40,875 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2019-01-08 14:06:40,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:40,904 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 40 treesize of output 90 [2019-01-08 14:06:40,905 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:40,939 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. [2019-01-08 14:06:40,939 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-01-08 14:06:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:40,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:41,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:41,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:06:41,007 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:41,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:41,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:41,008 INFO L87 Difference]: Start difference. First operand 533 states and 3598 transitions. Second operand 10 states. [2019-01-08 14:06:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:41,706 INFO L93 Difference]: Finished difference Result 795 states and 5176 transitions. [2019-01-08 14:06:41,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:06:41,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:06:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:41,711 INFO L225 Difference]: With dead ends: 795 [2019-01-08 14:06:41,711 INFO L226 Difference]: Without dead ends: 794 [2019-01-08 14:06:41,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2019-01-08 14:06:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 484. [2019-01-08 14:06:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-01-08 14:06:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 3230 transitions. [2019-01-08 14:06:41,881 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 3230 transitions. Word has length 6 [2019-01-08 14:06:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:41,882 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 3230 transitions. [2019-01-08 14:06:41,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 3230 transitions. [2019-01-08 14:06:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:41,883 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:41,883 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:41,883 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 904452838, now seen corresponding path program 1 times [2019-01-08 14:06:41,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:41,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:41,884 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:42,112 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-01-08 14:06:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:42,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:42,155 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:42,155 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:42,155 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [30], [31] [2019-01-08 14:06:42,156 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:42,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:42,158 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:42,158 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:42,159 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:42,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:42,159 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:42,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:42,168 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:42,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:42,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:42,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:06:42,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:06:42,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:06:42,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:06:42,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:06:42,212 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,238 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,260 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,275 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,288 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,302 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:06:42,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:06:42,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:06:42,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:06:42,419 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,435 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,450 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,466 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:42,497 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:06:42,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-08 14:06:42,539 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:42,564 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-08 14:06:42,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:42,597 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:42,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 81 [2019-01-08 14:06:42,605 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:06:42,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:06:42,697 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:76 [2019-01-08 14:06:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:42,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:42,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:42,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-08 14:06:42,787 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:42,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:06:42,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:06:42,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:42,787 INFO L87 Difference]: Start difference. First operand 484 states and 3230 transitions. Second operand 9 states. [2019-01-08 14:06:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:43,608 INFO L93 Difference]: Finished difference Result 539 states and 3425 transitions. [2019-01-08 14:06:43,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:06:43,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:06:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:43,612 INFO L225 Difference]: With dead ends: 539 [2019-01-08 14:06:43,613 INFO L226 Difference]: Without dead ends: 538 [2019-01-08 14:06:43,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:06:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-01-08 14:06:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 500. [2019-01-08 14:06:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-01-08 14:06:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3342 transitions. [2019-01-08 14:06:43,819 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3342 transitions. Word has length 6 [2019-01-08 14:06:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:43,820 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3342 transitions. [2019-01-08 14:06:43,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:06:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3342 transitions. [2019-01-08 14:06:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:43,821 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:43,821 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:06:43,821 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash 893599114, now seen corresponding path program 4 times [2019-01-08 14:06:43,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:43,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:43,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:43,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:43,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:43,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:43,914 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:43,914 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:06:43,914 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:06:43,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:43,914 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:43,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:43,923 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:43,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:43,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:43,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:43,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:43,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:43,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:43,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:06:43,983 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,013 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,037 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,055 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,070 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,083 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:06:44,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:06:44,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:06:44,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:44,304 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,321 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,337 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,351 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,384 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. [2019-01-08 14:06:44,385 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:06:44,624 WARN L181 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-08 14:06:44,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-08 14:06:44,672 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:06:44,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-01-08 14:06:44,783 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-01-08 14:06:45,026 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-01-08 14:06:45,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 81 [2019-01-08 14:06:45,050 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 91 [2019-01-08 14:06:45,145 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-08 14:06:45,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-01-08 14:06:45,270 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:126 [2019-01-08 14:06:45,512 WARN L181 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2019-01-08 14:06:45,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 101 [2019-01-08 14:06:45,532 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 111 [2019-01-08 14:06:45,640 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-08 14:06:45,745 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,830 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-08 14:06:45,830 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:159, output treesize:123 [2019-01-08 14:06:46,082 WARN L181 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-01-08 14:06:46,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 125 [2019-01-08 14:06:46,135 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-08 14:06:46,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-08 14:06:46,468 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,634 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:46,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-08 14:06:46,637 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,778 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-08 14:06:46,778 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:238 [2019-01-08 14:06:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:46,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:47,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:47,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:06:47,000 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:47,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:06:47,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:06:47,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:06:47,001 INFO L87 Difference]: Start difference. First operand 500 states and 3342 transitions. Second operand 11 states. [2019-01-08 14:06:47,231 WARN L181 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-01-08 14:06:47,896 WARN L181 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-01-08 14:06:48,400 WARN L181 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2019-01-08 14:06:48,939 WARN L181 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2019-01-08 14:06:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:49,994 INFO L93 Difference]: Finished difference Result 678 states and 4253 transitions. [2019-01-08 14:06:49,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:06:49,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:06:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:49,999 INFO L225 Difference]: With dead ends: 678 [2019-01-08 14:06:49,999 INFO L226 Difference]: Without dead ends: 673 [2019-01-08 14:06:49,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:06:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-01-08 14:06:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 555. [2019-01-08 14:06:50,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2019-01-08 14:06:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 3727 transitions. [2019-01-08 14:06:50,232 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 3727 transitions. Word has length 6 [2019-01-08 14:06:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:50,233 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 3727 transitions. [2019-01-08 14:06:50,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:06:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 3727 transitions. [2019-01-08 14:06:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:50,234 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:50,234 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:06:50,234 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash 893598680, now seen corresponding path program 2 times [2019-01-08 14:06:50,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:50,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:50,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:50,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:50,235 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:50,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:50,406 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:50,406 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:06:50,406 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:06:50,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:50,406 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:50,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:06:50,415 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:06:50,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:06:50,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:06:50,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:50,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:50,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:50,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:50,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:50,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:50,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:50,491 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,532 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,556 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,576 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,589 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,603 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,637 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 68 treesize of output 71 [2019-01-08 14:06:50,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:50,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,737 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:50,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:50,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:50,869 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,895 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,919 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,946 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,973 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,020 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,021 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:51,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:06:51,056 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,103 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:51,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:06:51,195 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:06:51,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:06:51,285 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,341 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:55 [2019-01-08 14:06:51,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 135 [2019-01-08 14:06:51,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,449 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:45 [2019-01-08 14:06:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:51,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:51,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:51,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:06:51,540 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:51,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:06:51,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:06:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:06:51,541 INFO L87 Difference]: Start difference. First operand 555 states and 3727 transitions. Second operand 11 states. [2019-01-08 14:06:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:52,430 INFO L93 Difference]: Finished difference Result 704 states and 4501 transitions. [2019-01-08 14:06:52,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:06:52,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:06:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:52,436 INFO L225 Difference]: With dead ends: 704 [2019-01-08 14:06:52,436 INFO L226 Difference]: Without dead ends: 703 [2019-01-08 14:06:52,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:06:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-01-08 14:06:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2019-01-08 14:06:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-01-08 14:06:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 4427 transitions. [2019-01-08 14:06:52,719 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 4427 transitions. Word has length 6 [2019-01-08 14:06:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:52,719 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 4427 transitions. [2019-01-08 14:06:52,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:06:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 4427 transitions. [2019-01-08 14:06:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:52,720 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:52,720 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:52,721 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash 893604446, now seen corresponding path program 2 times [2019-01-08 14:06:52,721 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:52,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:52,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:06:52,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:52,722 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:52,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:52,939 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:52,939 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:06:52,939 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:06:52,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:52,939 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:52,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:06:52,948 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:06:52,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:06:52,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:06:52,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:52,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:52,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:52,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:52,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:52,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:52,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:53,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:53,009 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,049 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,072 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,091 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,105 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,119 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:06:53,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:53,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:53,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:53,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:53,371 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,395 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,421 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,448 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,475 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,521 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:53,521 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:53,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:06:53,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:53,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:53,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:06:53,641 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:53,689 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:06:53,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,729 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:53,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:06:53,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:53,784 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:06:53,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,821 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:53,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-08 14:06:53,823 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,876 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:53,876 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-08 14:06:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:53,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:53,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:53,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:06:53,976 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:53,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:06:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:06:53,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:06:53,976 INFO L87 Difference]: Start difference. First operand 655 states and 4427 transitions. Second operand 12 states. [2019-01-08 14:06:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:55,401 INFO L93 Difference]: Finished difference Result 1218 states and 7896 transitions. [2019-01-08 14:06:55,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-08 14:06:55,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:06:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:55,410 INFO L225 Difference]: With dead ends: 1218 [2019-01-08 14:06:55,410 INFO L226 Difference]: Without dead ends: 1217 [2019-01-08 14:06:55,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:06:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2019-01-08 14:06:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 738. [2019-01-08 14:06:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2019-01-08 14:06:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 5008 transitions. [2019-01-08 14:06:55,797 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 5008 transitions. Word has length 6 [2019-01-08 14:06:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:55,797 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 5008 transitions. [2019-01-08 14:06:55,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:06:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 5008 transitions. [2019-01-08 14:06:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:55,799 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:55,799 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:55,799 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 893724170, now seen corresponding path program 1 times [2019-01-08 14:06:55,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:55,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:55,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:06:55,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:55,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:55,963 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:06:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:55,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:55,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:55,987 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:55,987 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [29] [2019-01-08 14:06:55,988 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:55,988 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:55,990 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:55,990 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:55,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:55,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:55,991 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:56,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:56,010 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:56,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:56,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:56,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:56,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,076 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:56,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:56,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:56,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:06:56,101 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,140 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,162 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,180 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,195 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,209 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:06:56,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:06:56,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:06:56,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:06:56,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:06:56,464 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,489 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,514 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,541 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,568 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,646 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:56,646 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:06:56,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:06:56,681 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,724 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:56,724 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:06:56,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,759 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:56,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:06:56,760 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:56,806 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:59 [2019-01-08 14:06:56,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:06:56,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:56,894 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:47 [2019-01-08 14:06:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:56,918 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:56,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:56,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:06:56,976 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:56,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:06:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:06:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:56,976 INFO L87 Difference]: Start difference. First operand 738 states and 5008 transitions. Second operand 10 states. [2019-01-08 14:06:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:57,827 INFO L93 Difference]: Finished difference Result 814 states and 5311 transitions. [2019-01-08 14:06:57,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:57,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:06:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:57,832 INFO L225 Difference]: With dead ends: 814 [2019-01-08 14:06:57,832 INFO L226 Difference]: Without dead ends: 811 [2019-01-08 14:06:57,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:06:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-01-08 14:06:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 775. [2019-01-08 14:06:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2019-01-08 14:06:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 5267 transitions. [2019-01-08 14:06:58,190 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 5267 transitions. Word has length 6 [2019-01-08 14:06:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:58,190 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 5267 transitions. [2019-01-08 14:06:58,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:06:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 5267 transitions. [2019-01-08 14:06:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:06:58,192 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:58,192 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:06:58,192 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash 893714560, now seen corresponding path program 1 times [2019-01-08 14:06:58,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:58,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:58,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:58,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:58,193 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:58,478 WARN L181 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2019-01-08 14:06:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:06:58,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:58,495 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:58,495 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:06:58,495 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [28], [29] [2019-01-08 14:06:58,496 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:58,496 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:58,498 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:58,498 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:06:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:58,498 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:58,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:58,498 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:58,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:58,510 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:58,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:58,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:06:58,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:06:58,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:06:58,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:58,653 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,670 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,687 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,703 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:06:58,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:06:58,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:06:58,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:06:58,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:06:58,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:06:58,750 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,776 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,796 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,813 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,826 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,837 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:58,869 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:06:58,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:06:58,921 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,950 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:58,950 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-08 14:06:58,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:58,982 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:58,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:06:58,983 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:59,014 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2019-01-08 14:06:59,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,045 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:59,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:06:59,047 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,075 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:59,075 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:42 [2019-01-08 14:06:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:59,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:59,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:59,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:06:59,160 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:59,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:06:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:06:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:59,160 INFO L87 Difference]: Start difference. First operand 775 states and 5267 transitions. Second operand 9 states. [2019-01-08 14:07:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:00,125 INFO L93 Difference]: Finished difference Result 812 states and 5339 transitions. [2019-01-08 14:07:00,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:07:00,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:07:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:00,130 INFO L225 Difference]: With dead ends: 812 [2019-01-08 14:07:00,131 INFO L226 Difference]: Without dead ends: 811 [2019-01-08 14:07:00,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:07:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-01-08 14:07:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 780. [2019-01-08 14:07:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-01-08 14:07:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 5302 transitions. [2019-01-08 14:07:00,561 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 5302 transitions. Word has length 6 [2019-01-08 14:07:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:00,561 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 5302 transitions. [2019-01-08 14:07:00,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:07:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 5302 transitions. [2019-01-08 14:07:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:00,563 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:00,563 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:00,563 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash 893787660, now seen corresponding path program 1 times [2019-01-08 14:07:00,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:00,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:00,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:00,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:00,564 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:07:00,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:00,651 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:00,651 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:00,652 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [30], [31] [2019-01-08 14:07:00,652 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:00,653 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:00,654 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:00,654 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:07:00,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:00,655 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:00,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:00,655 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:00,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:00,664 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:00,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:00,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:00,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:07:00,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:07:00,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:07:00,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:07:00,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:07:00,735 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,775 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,796 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,812 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,825 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,837 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:07:00,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:07:00,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:07:00,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:07:01,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:07:01,049 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,072 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,096 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,119 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,145 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:01,189 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:07:01,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:07:01,413 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:01,872 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:07:01,872 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-01-08 14:07:01,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-08 14:07:02,008 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,040 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:02,041 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:38 [2019-01-08 14:07:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:02,061 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:02,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:02,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:07:02,099 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:02,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:07:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:07:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:07:02,100 INFO L87 Difference]: Start difference. First operand 780 states and 5302 transitions. Second operand 8 states. [2019-01-08 14:07:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:02,812 INFO L93 Difference]: Finished difference Result 843 states and 5575 transitions. [2019-01-08 14:07:02,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:07:02,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:07:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:02,816 INFO L225 Difference]: With dead ends: 843 [2019-01-08 14:07:02,816 INFO L226 Difference]: Without dead ends: 842 [2019-01-08 14:07:02,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:07:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2019-01-08 14:07:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 813. [2019-01-08 14:07:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-01-08 14:07:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 5533 transitions. [2019-01-08 14:07:03,201 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 5533 transitions. Word has length 6 [2019-01-08 14:07:03,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:03,201 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 5533 transitions. [2019-01-08 14:07:03,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:07:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 5533 transitions. [2019-01-08 14:07:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:03,203 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:03,203 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:03,203 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash 893774142, now seen corresponding path program 1 times [2019-01-08 14:07:03,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:03,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:03,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:03,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:03,204 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:07:03,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:03,296 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:03,296 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:03,296 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [29] [2019-01-08 14:07:03,297 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:03,297 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:03,298 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:03,299 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:03,299 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:03,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:03,299 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:03,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:03,312 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:03,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:03,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:07:03,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:07:03,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:07:03,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:07:03,469 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,490 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,511 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,533 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:03,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:07:03,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:03,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:03,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:03,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:07:03,584 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,612 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,633 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,649 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,663 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,675 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:03,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:03,708 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:07:03,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:03,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-08 14:07:03,825 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:03,931 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:07:03,932 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-01-08 14:07:04,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 103 [2019-01-08 14:07:04,092 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-08 14:07:04,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,421 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:04,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 88 [2019-01-08 14:07:04,423 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:04,590 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 19 dim-0 vars, and 6 xjuncts. [2019-01-08 14:07:04,590 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:126, output treesize:278 [2019-01-08 14:07:04,780 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2019-01-08 14:07:04,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 88 [2019-01-08 14:07:04,789 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:04,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,927 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:04,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 100 [2019-01-08 14:07:04,930 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,056 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:05,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 94 [2019-01-08 14:07:05,058 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,186 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:05,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-08 14:07:05,188 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2019-01-08 14:07:05,287 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:227, output treesize:173 [2019-01-08 14:07:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:05,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:05,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:05,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:07:05,490 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:05,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:05,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:05,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:05,491 INFO L87 Difference]: Start difference. First operand 813 states and 5533 transitions. Second operand 10 states. [2019-01-08 14:07:05,696 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2019-01-08 14:07:05,946 WARN L181 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-01-08 14:07:06,149 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2019-01-08 14:07:06,376 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2019-01-08 14:07:11,045 WARN L181 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-01-08 14:07:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:11,354 INFO L93 Difference]: Finished difference Result 896 states and 5824 transitions. [2019-01-08 14:07:11,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:07:11,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:07:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:11,358 INFO L225 Difference]: With dead ends: 896 [2019-01-08 14:07:11,358 INFO L226 Difference]: Without dead ends: 895 [2019-01-08 14:07:11,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:07:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2019-01-08 14:07:11,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 848. [2019-01-08 14:07:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-01-08 14:07:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 5778 transitions. [2019-01-08 14:07:11,711 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 5778 transitions. Word has length 6 [2019-01-08 14:07:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:11,711 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 5778 transitions. [2019-01-08 14:07:11,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 5778 transitions. [2019-01-08 14:07:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:11,713 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:11,713 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:11,713 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash 893364756, now seen corresponding path program 1 times [2019-01-08 14:07:11,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:11,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:11,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:11,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:11,715 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:11,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:11,894 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:11,894 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:11,894 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [22], [28], [29] [2019-01-08 14:07:11,895 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:11,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:11,897 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:11,897 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:11,898 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:11,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:11,898 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:11,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:11,914 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:11,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:11,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:07:11,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:07:12,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:07:12,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:07:12,062 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,078 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,095 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,112 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:12,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:07:12,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:12,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:12,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:12,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:07:12,153 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,181 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,201 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,217 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,231 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,243 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,274 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. [2019-01-08 14:07:12,275 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-08 14:07:12,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:07:12,331 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,362 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:12,362 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-08 14:07:12,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-08 14:07:12,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,425 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:12,426 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-01-08 14:07:12,663 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-01-08 14:07:12,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:12,787 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:12,789 INFO L303 Elim1Store]: Index analysis took 123 ms [2019-01-08 14:07:12,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-08 14:07:12,790 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:12,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:12,966 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-08 14:07:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:12,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:13,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:13,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:07:13,037 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:13,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:13,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:13,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:13,038 INFO L87 Difference]: Start difference. First operand 848 states and 5778 transitions. Second operand 10 states. [2019-01-08 14:07:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:14,055 INFO L93 Difference]: Finished difference Result 975 states and 6393 transitions. [2019-01-08 14:07:14,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:07:14,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:07:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:14,058 INFO L225 Difference]: With dead ends: 975 [2019-01-08 14:07:14,058 INFO L226 Difference]: Without dead ends: 973 [2019-01-08 14:07:14,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:07:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-01-08 14:07:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 930. [2019-01-08 14:07:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2019-01-08 14:07:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 6346 transitions. [2019-01-08 14:07:14,465 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 6346 transitions. Word has length 6 [2019-01-08 14:07:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:14,465 INFO L480 AbstractCegarLoop]: Abstraction has 930 states and 6346 transitions. [2019-01-08 14:07:14,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 6346 transitions. [2019-01-08 14:07:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:14,467 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:14,467 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:14,467 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash 893370586, now seen corresponding path program 1 times [2019-01-08 14:07:14,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:14,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:14,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:14,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:14,469 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:07:14,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:14,616 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:14,616 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:14,617 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [30], [31] [2019-01-08 14:07:14,618 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:14,618 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:14,620 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:14,620 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:07:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:14,620 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:14,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:14,620 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:14,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:14,641 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:14,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:14,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:14,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:07:14,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:07:14,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:07:14,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:07:14,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:07:14,726 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,752 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,774 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,791 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,804 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,818 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:07:14,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:07:14,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:07:14,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:07:14,946 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,961 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,976 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,992 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:15,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:15,024 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:07:15,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:07:15,071 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:15,162 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:07:15,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-01-08 14:07:15,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 86 [2019-01-08 14:07:15,206 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:15,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,274 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:15,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 59 [2019-01-08 14:07:15,276 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:15,319 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:07:15,320 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:108, output treesize:84 [2019-01-08 14:07:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:15,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:15,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:15,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:07:15,430 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:15,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:07:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:07:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:07:15,431 INFO L87 Difference]: Start difference. First operand 930 states and 6346 transitions. Second operand 8 states. [2019-01-08 14:07:15,800 WARN L181 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2019-01-08 14:07:16,539 WARN L181 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-01-08 14:07:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:17,390 INFO L93 Difference]: Finished difference Result 985 states and 6551 transitions. [2019-01-08 14:07:17,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:07:17,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:07:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:17,394 INFO L225 Difference]: With dead ends: 985 [2019-01-08 14:07:17,394 INFO L226 Difference]: Without dead ends: 984 [2019-01-08 14:07:17,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:17,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2019-01-08 14:07:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 951. [2019-01-08 14:07:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2019-01-08 14:07:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 6492 transitions. [2019-01-08 14:07:17,845 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 6492 transitions. Word has length 6 [2019-01-08 14:07:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:17,846 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 6492 transitions. [2019-01-08 14:07:17,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:07:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 6492 transitions. [2019-01-08 14:07:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:17,847 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:17,848 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:17,848 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:17,848 INFO L82 PathProgramCache]: Analyzing trace with hash 908380782, now seen corresponding path program 1 times [2019-01-08 14:07:17,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:17,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:17,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:17,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:17,849 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:17,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:17,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:17,950 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:17,950 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [24], [27] [2019-01-08 14:07:17,951 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:17,951 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:17,953 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:17,953 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:07:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:17,954 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:17,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:17,954 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:17,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:17,962 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:17,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:17,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:07:18,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:07:18,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:07:18,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:07:18,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:07:18,215 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,242 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,268 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,296 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:18,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:07:18,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:18,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:18,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:18,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:07:18,374 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,410 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,429 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,446 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,459 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,472 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,518 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:18,519 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:07:18,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:07:18,563 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,609 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:18,610 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:07:18,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:07:18,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:18,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:07:18,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,748 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:18,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:07:18,751 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,800 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:18,801 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:07:18,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,845 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:18,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-08 14:07:18,847 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:18,927 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-08 14:07:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:18,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:19,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:19,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:07:19,800 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:19,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:07:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:07:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:07:19,801 INFO L87 Difference]: Start difference. First operand 951 states and 6492 transitions. Second operand 12 states. [2019-01-08 14:07:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:24,212 INFO L93 Difference]: Finished difference Result 1024 states and 6701 transitions. [2019-01-08 14:07:24,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:07:24,213 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:07:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:24,217 INFO L225 Difference]: With dead ends: 1024 [2019-01-08 14:07:24,217 INFO L226 Difference]: Without dead ends: 1023 [2019-01-08 14:07:24,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:07:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2019-01-08 14:07:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 948. [2019-01-08 14:07:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2019-01-08 14:07:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 6467 transitions. [2019-01-08 14:07:24,668 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 6467 transitions. Word has length 6 [2019-01-08 14:07:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:24,668 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 6467 transitions. [2019-01-08 14:07:24,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:07:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 6467 transitions. [2019-01-08 14:07:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:24,670 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:24,670 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:24,671 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash 908380906, now seen corresponding path program 1 times [2019-01-08 14:07:24,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:24,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:24,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:24,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:24,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:24,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:24,872 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:24,872 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:24,873 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [27] [2019-01-08 14:07:24,874 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:24,874 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:24,876 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:24,876 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:07:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:24,876 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:24,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:24,876 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:24,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:24,889 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:24,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:24,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:24,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:07:24,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:24,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:24,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:24,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:07:24,963 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,009 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,031 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,050 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,064 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,078 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:07:25,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:07:25,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,198 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:07:25,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:07:25,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:07:25,333 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,360 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,413 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,440 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,487 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:25,487 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:07:25,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:07:25,532 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,577 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:25,577 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:07:25,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:07:25,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,669 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:25,669 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:07:25,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,713 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:25,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:07:25,715 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,766 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:25,767 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:07:25,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,812 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:25,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-01-08 14:07:25,814 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,866 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:25,866 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-01-08 14:07:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:25,892 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:25,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:25,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:07:25,970 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:25,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:07:25,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:07:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:07:25,972 INFO L87 Difference]: Start difference. First operand 948 states and 6467 transitions. Second operand 12 states. [2019-01-08 14:07:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:27,341 INFO L93 Difference]: Finished difference Result 1059 states and 6958 transitions. [2019-01-08 14:07:27,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:07:27,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:07:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:27,345 INFO L225 Difference]: With dead ends: 1059 [2019-01-08 14:07:27,345 INFO L226 Difference]: Without dead ends: 1057 [2019-01-08 14:07:27,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:07:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-01-08 14:07:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 945. [2019-01-08 14:07:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-01-08 14:07:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 6457 transitions. [2019-01-08 14:07:27,797 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 6457 transitions. Word has length 6 [2019-01-08 14:07:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:27,797 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 6457 transitions. [2019-01-08 14:07:27,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:07:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 6457 transitions. [2019-01-08 14:07:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:27,799 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:27,799 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:27,799 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash 908367452, now seen corresponding path program 1 times [2019-01-08 14:07:27,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:27,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:27,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:27,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:27,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:27,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:27,873 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:27,873 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:27,873 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [27] [2019-01-08 14:07:27,874 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:27,874 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:27,876 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:27,876 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:07:27,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:27,876 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:27,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:27,876 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:27,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:27,885 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:27,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:27,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:27,919 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 24 treesize of output 30 [2019-01-08 14:07:27,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:27,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:27,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:27,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:07:27,949 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:27,978 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,001 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,019 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,034 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,047 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:07:28,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:07:28,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,153 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:07:28,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:07:28,203 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,220 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,236 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,252 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,285 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:28,286 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2019-01-08 14:07:28,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:07:28,356 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:28,387 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-01-08 14:07:28,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:07:28,426 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,455 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:28,456 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:38 [2019-01-08 14:07:28,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,489 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:28,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-08 14:07:28,492 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:28,525 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2019-01-08 14:07:28,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,561 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:28,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2019-01-08 14:07:28,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,595 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:28,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2019-01-08 14:07:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:28,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:28,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:28,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:07:28,697 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:28,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:07:28,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:07:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:07:28,698 INFO L87 Difference]: Start difference. First operand 945 states and 6457 transitions. Second operand 12 states. [2019-01-08 14:07:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:31,060 INFO L93 Difference]: Finished difference Result 1044 states and 6871 transitions. [2019-01-08 14:07:31,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:07:31,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:07:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:31,065 INFO L225 Difference]: With dead ends: 1044 [2019-01-08 14:07:31,065 INFO L226 Difference]: Without dead ends: 1042 [2019-01-08 14:07:31,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:07:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2019-01-08 14:07:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 982. [2019-01-08 14:07:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2019-01-08 14:07:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 6716 transitions. [2019-01-08 14:07:31,509 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 6716 transitions. Word has length 6 [2019-01-08 14:07:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:31,509 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 6716 transitions. [2019-01-08 14:07:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:07:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 6716 transitions. [2019-01-08 14:07:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:31,511 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:31,511 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:31,511 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash 908371606, now seen corresponding path program 2 times [2019-01-08 14:07:31,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:31,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:31,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:31,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:31,513 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:31,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:31,669 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:31,669 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:07:31,669 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:07:31,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:31,669 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:31,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:07:31,679 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:07:31,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:07:31,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:07:31,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:31,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:07:31,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:07:31,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:07:31,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:07:31,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:31,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:07:31,928 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:31,955 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:31,982 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,010 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,035 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:32,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:07:32,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:32,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:32,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:32,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:07:32,085 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,120 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,141 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,157 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,171 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,183 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:32,229 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:07:32,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:07:32,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:32,321 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:07:32,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:07:32,368 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,415 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:32,416 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:07:32,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,463 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:32,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:07:32,465 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,516 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:32,516 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:07:32,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,558 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:32,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:32,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:07:32,561 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:32,611 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:32,612 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:07:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:32,636 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:32,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:32,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:07:32,718 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:32,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:07:32,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:07:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:07:32,718 INFO L87 Difference]: Start difference. First operand 982 states and 6716 transitions. Second operand 12 states. [2019-01-08 14:07:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:34,047 INFO L93 Difference]: Finished difference Result 1044 states and 6839 transitions. [2019-01-08 14:07:34,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:07:34,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:07:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:34,052 INFO L225 Difference]: With dead ends: 1044 [2019-01-08 14:07:34,052 INFO L226 Difference]: Without dead ends: 1041 [2019-01-08 14:07:34,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:07:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2019-01-08 14:07:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 980. [2019-01-08 14:07:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2019-01-08 14:07:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 6702 transitions. [2019-01-08 14:07:34,549 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 6702 transitions. Word has length 6 [2019-01-08 14:07:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:34,549 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 6702 transitions. [2019-01-08 14:07:34,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:07:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 6702 transitions. [2019-01-08 14:07:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:34,551 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:34,551 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:34,551 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash 908017958, now seen corresponding path program 1 times [2019-01-08 14:07:34,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:34,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:34,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:07:34,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:34,552 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:34,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:34,637 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:34,637 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:34,638 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [27] [2019-01-08 14:07:34,638 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:34,639 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:34,640 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:34,640 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:07:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:34,641 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:34,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:34,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:34,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:34,651 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:34,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:34,817 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-08 14:07:34,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:34,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:07:34,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:34,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:34,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:34,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:34,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:07:34,898 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:34,927 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:34,951 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:34,969 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:34,984 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:34,998 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:35,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:07:35,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:07:35,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:07:35,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:07:35,155 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:35,197 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:35,211 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:35,228 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:35,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:35,261 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:07:35,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-08 14:07:35,371 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:35,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:07:35,480 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-01-08 14:07:35,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,603 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:35,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 93 [2019-01-08 14:07:35,613 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:35,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,768 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:35,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 80 [2019-01-08 14:07:35,770 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:35,857 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 3 xjuncts. [2019-01-08 14:07:35,858 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:135 [2019-01-08 14:07:35,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:35,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 95 [2019-01-08 14:07:36,003 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:36,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 93 [2019-01-08 14:07:36,176 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:36,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 86 [2019-01-08 14:07:36,297 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:36,394 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 4 xjuncts. [2019-01-08 14:07:36,394 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:165, output treesize:147 [2019-01-08 14:07:36,528 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-01-08 14:07:36,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 102 [2019-01-08 14:07:36,550 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:36,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,692 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:36,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 118 [2019-01-08 14:07:36,711 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2019-01-08 14:07:36,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:36,996 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:36,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 92 [2019-01-08 14:07:36,997 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:37,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,163 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:37,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 98 [2019-01-08 14:07:37,164 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:37,301 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-08 14:07:37,301 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 21 variables, input treesize:190, output treesize:230 [2019-01-08 14:07:37,517 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 103 [2019-01-08 14:07:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:37,520 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:37,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:37,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:07:37,635 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:37,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:07:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:07:37,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:07:37,636 INFO L87 Difference]: Start difference. First operand 980 states and 6702 transitions. Second operand 12 states. [2019-01-08 14:07:37,835 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-01-08 14:07:38,113 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-01-08 14:07:38,541 WARN L181 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2019-01-08 14:07:38,994 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2019-01-08 14:07:39,493 WARN L181 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2019-01-08 14:07:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:40,420 INFO L93 Difference]: Finished difference Result 1104 states and 7131 transitions. [2019-01-08 14:07:40,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:07:40,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:07:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:40,426 INFO L225 Difference]: With dead ends: 1104 [2019-01-08 14:07:40,426 INFO L226 Difference]: Without dead ends: 1102 [2019-01-08 14:07:40,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-01-08 14:07:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2019-01-08 14:07:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 984. [2019-01-08 14:07:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2019-01-08 14:07:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 6730 transitions. [2019-01-08 14:07:40,865 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 6730 transitions. Word has length 6 [2019-01-08 14:07:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:40,865 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 6730 transitions. [2019-01-08 14:07:40,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:07:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 6730 transitions. [2019-01-08 14:07:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:40,867 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:40,867 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:40,867 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash 908017524, now seen corresponding path program 1 times [2019-01-08 14:07:40,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:40,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:40,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:40,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:40,868 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:40,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:40,973 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:40,974 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:40,974 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [27] [2019-01-08 14:07:40,974 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:40,974 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:40,976 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:40,976 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:07:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:40,977 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:40,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:40,977 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:40,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:40,987 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:40,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:41,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:07:41,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:07:41,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:07:41,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:07:41,148 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,171 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,192 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,214 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:41,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:07:41,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:07:41,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:07:41,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:07:41,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:07:41,257 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,283 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,301 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,317 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,330 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,342 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,375 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:41,376 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:07:41,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:07:41,434 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,464 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:41,465 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-08 14:07:41,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,497 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:41,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:07:41,498 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:41,531 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:42 [2019-01-08 14:07:41,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:07:41,567 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:41,600 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2019-01-08 14:07:41,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,671 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:41,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2019-01-08 14:07:41,674 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:41,710 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:34 [2019-01-08 14:07:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:41,731 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:41,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:41,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:07:41,800 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:41,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:07:41,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:07:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:07:41,801 INFO L87 Difference]: Start difference. First operand 984 states and 6730 transitions. Second operand 12 states. [2019-01-08 14:07:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:44,372 INFO L93 Difference]: Finished difference Result 1313 states and 8698 transitions. [2019-01-08 14:07:44,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:07:44,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:07:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:44,378 INFO L225 Difference]: With dead ends: 1313 [2019-01-08 14:07:44,379 INFO L226 Difference]: Without dead ends: 1312 [2019-01-08 14:07:44,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:07:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2019-01-08 14:07:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 839. [2019-01-08 14:07:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2019-01-08 14:07:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 5721 transitions. [2019-01-08 14:07:44,816 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 5721 transitions. Word has length 6 [2019-01-08 14:07:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:44,816 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 5721 transitions. [2019-01-08 14:07:44,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:07:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 5721 transitions. [2019-01-08 14:07:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:44,817 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:44,817 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:44,818 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash 908550478, now seen corresponding path program 1 times [2019-01-08 14:07:44,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:44,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:44,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:44,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:44,819 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:44,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:44,891 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:44,891 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:44,891 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [24], [28], [29] [2019-01-08 14:07:44,892 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:44,892 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:44,894 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:44,894 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:44,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:44,894 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:44,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:44,895 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:44,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:44,919 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:44,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:44,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:44,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:07:45,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:07:45,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,186 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-01-08 14:07:45,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:07:45,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:07:45,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:45,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:07:45,226 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:45,761 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,013 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,213 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,360 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,528 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:07:46,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:07:46,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:07:46,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:07:46,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:07:46,784 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,808 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,833 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,857 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,884 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:46,928 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:46,928 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:07:46,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:46,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-08 14:07:46,965 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:47,008 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:47,009 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-08 14:07:47,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2019-01-08 14:07:47,046 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:47,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:47,091 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2019-01-08 14:07:47,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:47,187 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:47,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-08 14:07:47,189 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:47,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:47,236 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-01-08 14:07:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:47,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:47,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:47,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:07:47,342 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:47,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:47,342 INFO L87 Difference]: Start difference. First operand 839 states and 5721 transitions. Second operand 10 states. [2019-01-08 14:07:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:48,336 INFO L93 Difference]: Finished difference Result 881 states and 5780 transitions. [2019-01-08 14:07:48,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:07:48,337 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:07:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:48,339 INFO L225 Difference]: With dead ends: 881 [2019-01-08 14:07:48,340 INFO L226 Difference]: Without dead ends: 880 [2019-01-08 14:07:48,340 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:07:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-01-08 14:07:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 841. [2019-01-08 14:07:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2019-01-08 14:07:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 5735 transitions. [2019-01-08 14:07:48,833 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 5735 transitions. Word has length 6 [2019-01-08 14:07:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:48,834 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 5735 transitions. [2019-01-08 14:07:48,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 5735 transitions. [2019-01-08 14:07:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:48,835 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:48,835 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:48,836 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash 908133404, now seen corresponding path program 1 times [2019-01-08 14:07:48,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:48,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:48,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:48,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:48,837 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:49,206 WARN L181 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2019-01-08 14:07:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:49,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:49,318 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:49,318 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:49,318 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [28], [29] [2019-01-08 14:07:49,319 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:49,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:49,321 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:49,321 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:49,321 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:49,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:49,321 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:49,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:49,331 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:49,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:49,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:49,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:07:49,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:07:49,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:07:49,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:07:49,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:07:49,379 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,407 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,428 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,445 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,458 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,472 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:07:49,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:07:49,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:07:49,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:07:49,601 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,614 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,628 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,645 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,674 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:49,674 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:07:49,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-08 14:07:49,713 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:49,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:49,740 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-08 14:07:49,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2019-01-08 14:07:49,776 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:49,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:07:49,894 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2019-01-08 14:07:49,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:49,941 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:49,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2019-01-08 14:07:49,944 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:50,010 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. [2019-01-08 14:07:50,011 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:27 [2019-01-08 14:07:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:50,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:50,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:50,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:07:50,074 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:50,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:07:50,075 INFO L87 Difference]: Start difference. First operand 841 states and 5735 transitions. Second operand 10 states. [2019-01-08 14:07:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:51,405 INFO L93 Difference]: Finished difference Result 1415 states and 9444 transitions. [2019-01-08 14:07:51,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:07:51,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:07:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:51,412 INFO L225 Difference]: With dead ends: 1415 [2019-01-08 14:07:51,412 INFO L226 Difference]: Without dead ends: 1413 [2019-01-08 14:07:51,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2019-01-08 14:07:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1280. [2019-01-08 14:07:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2019-01-08 14:07:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 8838 transitions. [2019-01-08 14:07:52,195 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 8838 transitions. Word has length 6 [2019-01-08 14:07:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:52,195 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 8838 transitions. [2019-01-08 14:07:52,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 8838 transitions. [2019-01-08 14:07:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:52,199 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:52,199 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:52,199 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash 909988134, now seen corresponding path program 1 times [2019-01-08 14:07:52,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:52,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:52,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:52,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:52,200 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:52,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:52,270 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:52,271 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:52,271 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [29] [2019-01-08 14:07:52,272 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:52,272 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:52,273 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:52,273 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:52,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:52,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:52,274 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:52,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:52,283 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:52,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:52,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:07:52,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:07:52,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,356 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 [2019-01-08 14:07:52,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:07:52,404 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,420 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,436 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,453 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:52,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:07:52,485 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 26 treesize of output 36 [2019-01-08 14:07:52,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:07:52,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:07:52,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:07:52,503 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,528 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,547 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,561 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,573 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,585 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:52,616 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:52,616 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:07:52,840 WARN L181 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-08 14:07:52,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:52,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:07:52,904 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-08 14:07:53,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-01-08 14:07:53,255 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:389 [2019-01-08 14:07:53,450 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 86 [2019-01-08 14:07:53,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2019-01-08 14:07:53,458 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:53,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,551 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:53,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 87 [2019-01-08 14:07:53,560 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:53,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,716 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:53,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 93 [2019-01-08 14:07:53,726 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:53,887 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 12 dim-0 vars, and 5 xjuncts. [2019-01-08 14:07:53,888 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 11 variables, input treesize:186, output treesize:180 [2019-01-08 14:07:53,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:53,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 77 [2019-01-08 14:07:53,992 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:54,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,067 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:54,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2019-01-08 14:07:54,068 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:54,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:54,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-08 14:07:54,134 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:54,184 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-01-08 14:07:54,184 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:132, output treesize:92 [2019-01-08 14:07:56,260 WARN L181 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 61 [2019-01-08 14:07:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:56,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:56,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:56,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:07:56,328 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:56,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:56,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:56,329 INFO L87 Difference]: Start difference. First operand 1280 states and 8838 transitions. Second operand 10 states. [2019-01-08 14:07:56,757 WARN L181 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-01-08 14:07:57,404 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2019-01-08 14:07:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:58,354 INFO L93 Difference]: Finished difference Result 1381 states and 9127 transitions. [2019-01-08 14:07:58,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:07:58,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:07:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:58,359 INFO L225 Difference]: With dead ends: 1381 [2019-01-08 14:07:58,360 INFO L226 Difference]: Without dead ends: 1379 [2019-01-08 14:07:58,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:07:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2019-01-08 14:07:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1274. [2019-01-08 14:07:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2019-01-08 14:07:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2019-01-08 14:07:59,135 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2019-01-08 14:07:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:59,135 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2019-01-08 14:07:59,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2019-01-08 14:07:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:07:59,138 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:59,138 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:07:59,138 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash 909993964, now seen corresponding path program 1 times [2019-01-08 14:07:59,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:59,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:59,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:59,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:59,139 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:07:59,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:59,186 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:59,187 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:07:59,187 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [28], [30], [31] [2019-01-08 14:07:59,187 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:59,188 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:59,189 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:59,189 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:07:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:59,189 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:59,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:59,190 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:59,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:59,198 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:59,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:59,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:07:59,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:07:59,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:07:59,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:07:59,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:07:59,409 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,440 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,466 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,491 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,519 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:07:59,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:07:59,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:07:59,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:07:59,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:07:59,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:07:59,591 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,625 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,644 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,658 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,670 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,682 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,725 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:59,726 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:07:59,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-08 14:07:59,754 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:59,798 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-08 14:07:59,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,832 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:59,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 112 [2019-01-08 14:07:59,842 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:07:59,991 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-08 14:07:59,991 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:110 [2019-01-08 14:08:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:00,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:00,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:00,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:08:00,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:00,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:08:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:08:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:08:00,081 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 8 states. [2019-01-08 14:08:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:01,320 INFO L93 Difference]: Finished difference Result 1306 states and 8833 transitions. [2019-01-08 14:08:01,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:08:01,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:08:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:01,325 INFO L225 Difference]: With dead ends: 1306 [2019-01-08 14:08:01,326 INFO L226 Difference]: Without dead ends: 1305 [2019-01-08 14:08:01,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2019-01-08 14:08:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1274. [2019-01-08 14:08:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2019-01-08 14:08:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2019-01-08 14:08:02,104 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2019-01-08 14:08:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:02,104 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2019-01-08 14:08:02,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:08:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2019-01-08 14:08:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:08:02,107 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:02,107 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:08:02,107 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 909980134, now seen corresponding path program 1 times [2019-01-08 14:08:02,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:02,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:02,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:02,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:02,109 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:02,258 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-01-08 14:08:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:02,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:02,314 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:02,315 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:08:02,315 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [24], [27] [2019-01-08 14:08:02,318 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:02,318 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:02,320 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:02,320 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:08:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:02,320 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:02,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:02,320 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:02,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:02,335 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:02,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:02,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:08:02,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:08:02,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:08:02,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:08:02,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:08:02,581 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,609 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,636 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,664 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,692 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:08:02,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:08:02,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:08:02,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:08:02,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:08:02,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:08:02,762 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,798 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,820 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,836 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,850 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,894 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:02,943 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:02,943 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:08:02,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:02,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:08:02,988 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,041 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:03,041 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:08:03,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,086 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:03,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-08 14:08:03,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,136 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:03,136 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:59 [2019-01-08 14:08:03,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-08 14:08:03,180 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,228 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:03,229 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:51 [2019-01-08 14:08:03,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,272 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:03,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2019-01-08 14:08:03,273 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,322 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:03,322 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-08 14:08:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:03,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:03,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:03,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:08:03,435 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:03,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:08:03,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:08:03,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:08:03,436 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 12 states. [2019-01-08 14:08:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:05,161 INFO L93 Difference]: Finished difference Result 1360 states and 9097 transitions. [2019-01-08 14:08:05,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:08:05,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:08:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:05,167 INFO L225 Difference]: With dead ends: 1360 [2019-01-08 14:08:05,167 INFO L226 Difference]: Without dead ends: 1358 [2019-01-08 14:08:05,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:08:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-01-08 14:08:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1309. [2019-01-08 14:08:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2019-01-08 14:08:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 9030 transitions. [2019-01-08 14:08:05,971 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 9030 transitions. Word has length 6 [2019-01-08 14:08:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:05,971 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 9030 transitions. [2019-01-08 14:08:05,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:08:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 9030 transitions. [2019-01-08 14:08:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:08:05,973 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:05,974 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:08:05,974 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 896939676, now seen corresponding path program 2 times [2019-01-08 14:08:05,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:05,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:05,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:05,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:05,975 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:08:06,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:06,061 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:06,061 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:08:06,061 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:08:06,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:06,061 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:06,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:08:06,072 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:08:06,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:08:06,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:08:06,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:06,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:08:06,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:08:06,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:08:06,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:08:06,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:08:06,326 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,352 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,380 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,408 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,435 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:08:06,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:08:06,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:08:06,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:08:06,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:08:06,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:08:06,486 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,522 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,543 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,559 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,573 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,585 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,632 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:06,633 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-08 14:08:06,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:08:06,661 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,709 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:06,709 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:08:06,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:08:06,743 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,793 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:06,793 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:08:06,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,831 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:06,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:08:06,833 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:06,881 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:06,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:08:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:06,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:06,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:06,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:08:06,957 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:06,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:08:06,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:08:06,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:06,957 INFO L87 Difference]: Start difference. First operand 1309 states and 9030 transitions. Second operand 10 states. [2019-01-08 14:08:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:08,843 INFO L93 Difference]: Finished difference Result 1898 states and 12744 transitions. [2019-01-08 14:08:08,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:08:08,843 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:08:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:08,849 INFO L225 Difference]: With dead ends: 1898 [2019-01-08 14:08:08,850 INFO L226 Difference]: Without dead ends: 1896 [2019-01-08 14:08:08,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:08:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2019-01-08 14:08:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1669. [2019-01-08 14:08:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2019-01-08 14:08:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 11590 transitions. [2019-01-08 14:08:09,947 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 11590 transitions. Word has length 6 [2019-01-08 14:08:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:09,947 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 11590 transitions. [2019-01-08 14:08:09,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:08:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 11590 transitions. [2019-01-08 14:08:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:08:09,951 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:09,951 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:08:09,951 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 897602894, now seen corresponding path program 1 times [2019-01-08 14:08:09,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:09,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:09,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:08:09,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:09,952 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:08:10,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:08:10,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-08 14:08:10,052 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:08:10,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-08 14:08:10,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-08 14:08:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-08 14:08:10,052 INFO L87 Difference]: Start difference. First operand 1669 states and 11590 transitions. Second operand 5 states. [2019-01-08 14:08:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:11,224 INFO L93 Difference]: Finished difference Result 1693 states and 11616 transitions. [2019-01-08 14:08:11,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:08:11,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-01-08 14:08:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:11,230 INFO L225 Difference]: With dead ends: 1693 [2019-01-08 14:08:11,230 INFO L226 Difference]: Without dead ends: 1692 [2019-01-08 14:08:11,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-08 14:08:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-01-08 14:08:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1672. [2019-01-08 14:08:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2019-01-08 14:08:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 11593 transitions. [2019-01-08 14:08:12,306 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 11593 transitions. Word has length 6 [2019-01-08 14:08:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:12,306 INFO L480 AbstractCegarLoop]: Abstraction has 1672 states and 11593 transitions. [2019-01-08 14:08:12,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-08 14:08:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 11593 transitions. [2019-01-08 14:08:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:08:12,309 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:12,309 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:08:12,309 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash 900997082, now seen corresponding path program 1 times [2019-01-08 14:08:12,310 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:12,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:12,310 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:12,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:12,359 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:12,360 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:08:12,360 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [28], [30], [31] [2019-01-08 14:08:12,360 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:12,360 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:12,361 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:12,362 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:08:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:12,362 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:12,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:12,362 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:12,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:12,370 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:12,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:12,380 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 21 treesize of output 24 [2019-01-08 14:08:12,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:08:12,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,391 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 26 treesize of output 36 [2019-01-08 14:08:12,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:08:12,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:08:12,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:08:12,428 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,473 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,493 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,510 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,524 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,538 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:08:12,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:08:12,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:08:12,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:08:12,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:08:12,753 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,778 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,802 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,826 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,853 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:12,898 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2019-01-08 14:08:12,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-08 14:08:12,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:12,965 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-08 14:08:12,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 99 [2019-01-08 14:08:12,995 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:13,039 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:13,040 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:51 [2019-01-08 14:08:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:13,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:13,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:13,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:08:13,088 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:13,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:08:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:08:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:08:13,088 INFO L87 Difference]: Start difference. First operand 1672 states and 11593 transitions. Second operand 8 states. [2019-01-08 14:08:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:15,328 INFO L93 Difference]: Finished difference Result 2759 states and 18997 transitions. [2019-01-08 14:08:15,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:08:15,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:08:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:15,337 INFO L225 Difference]: With dead ends: 2759 [2019-01-08 14:08:15,337 INFO L226 Difference]: Without dead ends: 2757 [2019-01-08 14:08:15,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:08:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2019-01-08 14:08:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2639. [2019-01-08 14:08:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2639 states. [2019-01-08 14:08:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 18434 transitions. [2019-01-08 14:08:17,163 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 18434 transitions. Word has length 6 [2019-01-08 14:08:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:17,163 INFO L480 AbstractCegarLoop]: Abstraction has 2639 states and 18434 transitions. [2019-01-08 14:08:17,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:08:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 18434 transitions. [2019-01-08 14:08:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:08:17,167 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:17,168 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:08:17,168 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash 900629790, now seen corresponding path program 1 times [2019-01-08 14:08:17,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:17,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:17,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:17,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:17,169 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:17,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:17,291 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:17,291 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:08:17,291 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [27] [2019-01-08 14:08:17,292 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:17,293 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:17,294 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:17,294 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:08:17,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:17,294 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:17,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:17,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:17,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:17,305 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:17,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:17,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:08:17,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:08:17,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:08:17,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:08:17,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:08:17,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:08:17,383 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:17,423 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:17,444 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:17,463 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:17,479 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:17,493 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:17,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:08:17,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:08:17,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,617 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 46 treesize of output 72 [2019-01-08 14:08:17,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:17,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:08:18,201 WARN L181 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-08 14:08:18,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:08:18,212 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,238 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,262 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,288 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,315 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,360 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:18,360 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:08:18,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:08:18,397 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:18,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:08:18,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,476 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:18,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:08:18,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,520 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:18,521 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2019-01-08 14:08:18,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:08:18,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:18,606 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2019-01-08 14:08:18,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,645 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:18,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:18,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:08:18,647 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:18,695 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:18,696 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:08:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:18,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:18,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:18,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:08:18,791 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:18,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:08:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:08:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:08:18,792 INFO L87 Difference]: Start difference. First operand 2639 states and 18434 transitions. Second operand 12 states. [2019-01-08 14:08:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:22,540 INFO L93 Difference]: Finished difference Result 3636 states and 24951 transitions. [2019-01-08 14:08:22,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:08:22,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:08:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:22,553 INFO L225 Difference]: With dead ends: 3636 [2019-01-08 14:08:22,553 INFO L226 Difference]: Without dead ends: 3626 [2019-01-08 14:08:22,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:08:22,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2019-01-08 14:08:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 2790. [2019-01-08 14:08:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-01-08 14:08:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 19490 transitions. [2019-01-08 14:08:25,228 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 19490 transitions. Word has length 6 [2019-01-08 14:08:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:25,228 INFO L480 AbstractCegarLoop]: Abstraction has 2790 states and 19490 transitions. [2019-01-08 14:08:25,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:08:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 19490 transitions. [2019-01-08 14:08:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:08:25,233 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:25,233 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:08:25,233 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash 900752924, now seen corresponding path program 2 times [2019-01-08 14:08:25,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:25,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:25,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:25,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:25,234 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:25,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:25,483 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:25,483 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:08:25,483 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:08:25,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:25,483 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:25,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:08:25,492 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:08:25,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:08:25,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:08:25,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:25,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:08:25,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:08:25,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:08:25,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:08:25,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:08:25,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:08:25,542 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,583 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,605 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,623 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,636 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,650 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:08:25,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:08:25,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,740 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:08:25,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:08:25,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:25,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:08:25,866 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,891 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,916 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,940 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:25,967 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:26,011 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:26,012 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:08:26,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-08 14:08:26,037 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:26,080 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:26,080 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-08 14:08:26,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:08:26,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:08:26,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:08:26,274 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:98 [2019-01-08 14:08:26,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:26,335 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:26,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:08:26,337 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:26,374 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:26,375 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:36 [2019-01-08 14:08:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:26,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:26,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:26,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:08:26,530 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:26,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:08:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:08:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:26,531 INFO L87 Difference]: Start difference. First operand 2790 states and 19490 transitions. Second operand 10 states. [2019-01-08 14:08:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:30,893 INFO L93 Difference]: Finished difference Result 4300 states and 29900 transitions. [2019-01-08 14:08:30,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:08:30,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:08:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:30,908 INFO L225 Difference]: With dead ends: 4300 [2019-01-08 14:08:30,908 INFO L226 Difference]: Without dead ends: 4298 [2019-01-08 14:08:30,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:08:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2019-01-08 14:08:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4076. [2019-01-08 14:08:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4076 states. [2019-01-08 14:08:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 28660 transitions. [2019-01-08 14:08:35,010 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 28660 transitions. Word has length 6 [2019-01-08 14:08:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:35,010 INFO L480 AbstractCegarLoop]: Abstraction has 4076 states and 28660 transitions. [2019-01-08 14:08:35,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:08:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 28660 transitions. [2019-01-08 14:08:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:08:35,016 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:35,016 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:08:35,016 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2030611754, now seen corresponding path program 1 times [2019-01-08 14:08:35,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:35,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:35,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:08:35,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:35,017 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:08:35,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:35,105 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:35,105 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:08:35,105 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [28], [29] [2019-01-08 14:08:35,106 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:35,106 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:35,108 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:35,108 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:08:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:35,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:35,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:35,109 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:35,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:35,117 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:35,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:35,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:08:35,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:08:35,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:08:35,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:08:35,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:08:35,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:08:35,181 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,221 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,243 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,262 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,276 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:08:35,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:08:35,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:08:35,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:08:35,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:08:35,540 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,566 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,606 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,632 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,659 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:35,706 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:08:35,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:08:35,753 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,796 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:35,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:08:35,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:08:35,841 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,889 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:35,890 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:08:35,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:35,938 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:35,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-08 14:08:35,940 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:35,990 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:35,990 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:08:36,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,033 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:36,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:36,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:08:36,036 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:36,084 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:36,085 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:08:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:36,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:36,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:36,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:08:36,189 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:36,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:08:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:08:36,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:08:36,190 INFO L87 Difference]: Start difference. First operand 4076 states and 28660 transitions. Second operand 11 states. [2019-01-08 14:08:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:40,924 INFO L93 Difference]: Finished difference Result 4236 states and 29539 transitions. [2019-01-08 14:08:40,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:08:40,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:08:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:40,938 INFO L225 Difference]: With dead ends: 4236 [2019-01-08 14:08:40,938 INFO L226 Difference]: Without dead ends: 4233 [2019-01-08 14:08:40,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:08:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2019-01-08 14:08:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 4163. [2019-01-08 14:08:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4163 states. [2019-01-08 14:08:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 29269 transitions. [2019-01-08 14:08:44,985 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 29269 transitions. Word has length 7 [2019-01-08 14:08:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:44,986 INFO L480 AbstractCegarLoop]: Abstraction has 4163 states and 29269 transitions. [2019-01-08 14:08:44,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:08:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 29269 transitions. [2019-01-08 14:08:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:08:44,992 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:44,992 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:08:44,992 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2030621364, now seen corresponding path program 1 times [2019-01-08 14:08:44,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:44,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:44,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:44,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:44,993 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:08:45,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:45,109 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:45,110 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:08:45,110 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [22], [28], [29] [2019-01-08 14:08:45,111 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:45,111 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:45,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:45,112 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:08:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:45,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:45,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:45,113 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:45,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:45,121 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:45,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:45,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:08:45,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:08:45,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:08:45,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:08:45,277 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,295 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,312 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,329 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:08:45,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:08:45,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:08:45,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:08:45,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:08:45,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:08:45,373 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,398 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,419 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,435 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,448 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,460 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,491 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:45,491 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2019-01-08 14:08:45,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:08:45,572 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:45,600 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-01-08 14:08:45,776 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-08 14:08:45,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:08:45,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,821 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:45,822 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2019-01-08 14:08:45,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,859 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:45,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2019-01-08 14:08:45,861 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:45,897 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2019-01-08 14:08:45,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:45,936 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:45,936 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 38 treesize of output 98 [2019-01-08 14:08:45,937 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:45,973 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. [2019-01-08 14:08:45,974 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2019-01-08 14:08:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:46,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:46,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:46,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:08:46,084 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:46,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:08:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:08:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:08:46,084 INFO L87 Difference]: Start difference. First operand 4163 states and 29269 transitions. Second operand 12 states. [2019-01-08 14:08:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:50,530 INFO L93 Difference]: Finished difference Result 4232 states and 29577 transitions. [2019-01-08 14:08:50,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:08:50,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:08:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:50,546 INFO L225 Difference]: With dead ends: 4232 [2019-01-08 14:08:50,546 INFO L226 Difference]: Without dead ends: 4231 [2019-01-08 14:08:50,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:08:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2019-01-08 14:08:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4190. [2019-01-08 14:08:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4190 states. [2019-01-08 14:08:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 29458 transitions. [2019-01-08 14:08:54,496 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 29458 transitions. Word has length 7 [2019-01-08 14:08:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:54,496 INFO L480 AbstractCegarLoop]: Abstraction has 4190 states and 29458 transitions. [2019-01-08 14:08:54,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:08:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 29458 transitions. [2019-01-08 14:08:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:08:54,502 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:54,502 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:08:54,502 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2030548264, now seen corresponding path program 1 times [2019-01-08 14:08:54,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:54,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:54,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:54,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:54,503 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:08:54,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:54,572 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:54,572 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:08:54,572 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [30], [31] [2019-01-08 14:08:54,573 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:54,573 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:54,575 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:54,575 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:08:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:54,575 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:54,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:54,576 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:54,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:54,585 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:54,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:54,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:08:54,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:08:54,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:08:54,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:08:54,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:54,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:08:54,793 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:54,824 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:54,852 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:54,881 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:54,914 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:54,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:08:54,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:08:54,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:08:54,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:08:55,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:08:55,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:08:55,032 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,063 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,082 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,097 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,109 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,123 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,166 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:55,167 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:08:55,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:08:55,203 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:55,242 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-08 14:08:55,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:08:55,298 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:08:55,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:08:55,448 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:98 [2019-01-08 14:08:55,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,526 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:55,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:55,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-08 14:08:55,529 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:55,563 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:55,563 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-08 14:08:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:55,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:55,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:55,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:08:55,645 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:55,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:08:55,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:08:55,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:55,645 INFO L87 Difference]: Start difference. First operand 4190 states and 29458 transitions. Second operand 10 states. [2019-01-08 14:09:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:09:00,247 INFO L93 Difference]: Finished difference Result 4570 states and 31903 transitions. [2019-01-08 14:09:00,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:09:00,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:09:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:09:00,264 INFO L225 Difference]: With dead ends: 4570 [2019-01-08 14:09:00,264 INFO L226 Difference]: Without dead ends: 4569 [2019-01-08 14:09:00,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:09:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2019-01-08 14:09:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4419. [2019-01-08 14:09:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4419 states. [2019-01-08 14:09:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 31072 transitions. [2019-01-08 14:09:04,408 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 31072 transitions. Word has length 7 [2019-01-08 14:09:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:09:04,408 INFO L480 AbstractCegarLoop]: Abstraction has 4419 states and 31072 transitions. [2019-01-08 14:09:04,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:09:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 31072 transitions. [2019-01-08 14:09:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:09:04,415 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:09:04,415 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:09:04,415 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:09:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2030561782, now seen corresponding path program 1 times [2019-01-08 14:09:04,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:09:04,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:04,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:04,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:04,416 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:09:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:09:04,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:04,648 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:09:04,649 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:09:04,649 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [28], [29] [2019-01-08 14:09:04,650 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:09:04,650 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:09:04,652 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:09:04,652 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:09:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:04,652 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:09:04,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:04,652 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:09:04,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:04,662 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:09:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:04,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:09:04,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:09:04,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:09:04,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:09:04,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:09:04,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:09:04,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:09:04,719 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:04,761 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:04,783 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:04,801 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:04,815 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:04,829 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:04,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:09:04,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:09:04,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:04,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:09:04,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:09:05,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:09:05,081 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,356 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,382 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,408 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,434 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,480 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:05,481 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:09:05,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:09:05,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:05,571 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:09:05,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:09:05,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,664 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:05,664 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:09:05,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,711 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:09:05,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:09:05,713 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,765 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:05,766 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:09:05,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,815 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:09:05,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 131 [2019-01-08 14:09:05,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,871 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:05,871 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-01-08 14:09:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:05,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:09:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:05,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:09:06,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:09:06,000 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:09:06,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:09:06,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:09:06,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:09:06,000 INFO L87 Difference]: Start difference. First operand 4419 states and 31072 transitions. Second operand 12 states. [2019-01-08 14:09:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:09:12,665 INFO L93 Difference]: Finished difference Result 5928 states and 41521 transitions. [2019-01-08 14:09:12,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:09:12,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:09:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:09:12,684 INFO L225 Difference]: With dead ends: 5928 [2019-01-08 14:09:12,684 INFO L226 Difference]: Without dead ends: 5927 [2019-01-08 14:09:12,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:09:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2019-01-08 14:09:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 5628. [2019-01-08 14:09:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2019-01-08 14:09:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 39710 transitions. [2019-01-08 14:09:18,282 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 39710 transitions. Word has length 7 [2019-01-08 14:09:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:09:18,282 INFO L480 AbstractCegarLoop]: Abstraction has 5628 states and 39710 transitions. [2019-01-08 14:09:18,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:09:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 39710 transitions. [2019-01-08 14:09:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:09:18,289 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:09:18,289 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:09:18,289 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:09:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:18,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2030965338, now seen corresponding path program 1 times [2019-01-08 14:09:18,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:09:18,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:18,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:18,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:18,291 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:09:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:09:18,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:18,425 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:09:18,425 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:09:18,425 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [30], [31] [2019-01-08 14:09:18,426 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:09:18,426 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:09:18,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:09:18,428 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:09:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:18,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:09:18,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:18,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:09:18,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:18,436 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:09:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:18,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:09:18,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:09:18,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:09:18,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:09:18,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,462 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:09:18,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:09:18,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:09:18,479 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,512 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,532 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,546 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,560 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,573 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:09:18,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:09:18,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:09:18,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:09:18,698 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,712 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,725 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,741 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,771 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:18,772 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-01-08 14:09:18,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-08 14:09:18,824 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:18,850 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:18,850 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2019-01-08 14:09:18,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:18,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2019-01-08 14:09:18,895 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:09:18,992 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:09:18,992 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:68 [2019-01-08 14:09:19,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,044 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:09:19,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 101 [2019-01-08 14:09:19,046 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:19,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:19,113 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:09:19,114 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 37 treesize of output 73 [2019-01-08 14:09:19,114 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:19,157 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:09:19,157 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:70 [2019-01-08 14:09:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:19,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:09:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:19,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:09:19,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2019-01-08 14:09:19,261 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:09:19,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:09:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:09:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:09:19,262 INFO L87 Difference]: Start difference. First operand 5628 states and 39710 transitions. Second operand 11 states. [2019-01-08 14:09:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:09:26,836 INFO L93 Difference]: Finished difference Result 6511 states and 45570 transitions. [2019-01-08 14:09:26,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:09:26,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:09:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:09:26,862 INFO L225 Difference]: With dead ends: 6511 [2019-01-08 14:09:26,862 INFO L226 Difference]: Without dead ends: 6510 [2019-01-08 14:09:26,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:09:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2019-01-08 14:09:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 6405. [2019-01-08 14:09:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6405 states. [2019-01-08 14:09:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 45149 transitions. [2019-01-08 14:09:34,276 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 45149 transitions. Word has length 7 [2019-01-08 14:09:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:09:34,277 INFO L480 AbstractCegarLoop]: Abstraction has 6405 states and 45149 transitions. [2019-01-08 14:09:34,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:09:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 45149 transitions. [2019-01-08 14:09:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:09:34,285 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:09:34,285 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:09:34,285 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:09:34,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:34,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2015785446, now seen corresponding path program 1 times [2019-01-08 14:09:34,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:09:34,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:34,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:34,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:34,286 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:09:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:34,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:34,609 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:09:34,610 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:09:34,610 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [28], [29] [2019-01-08 14:09:34,611 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:09:34,611 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:09:34,612 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:09:34,613 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:09:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:34,613 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:09:34,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:34,613 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:09:34,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:34,621 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:09:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:34,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:09:34,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:09:34,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:09:34,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:09:34,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:09:34,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:34,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:09:34,815 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:34,839 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:34,864 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:34,890 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:34,918 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:34,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:09:34,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:09:34,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:09:34,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:09:34,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:09:34,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:09:34,976 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,008 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,026 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,041 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,053 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,065 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:35,109 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:84, output treesize:87 [2019-01-08 14:09:35,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-08 14:09:35,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:35,209 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-01-08 14:09:35,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-08 14:09:35,251 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:35,282 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2019-01-08 14:09:35,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,319 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:09:35,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2019-01-08 14:09:35,321 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,355 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:35,355 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2019-01-08 14:09:35,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:35,396 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:09:35,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2019-01-08 14:09:35,397 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:35,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:35,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2019-01-08 14:09:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:35,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:09:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:35,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:09:35,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2019-01-08 14:09:35,545 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:09:35,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-08 14:09:35,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-08 14:09:35,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:09:35,545 INFO L87 Difference]: Start difference. First operand 6405 states and 45149 transitions. Second operand 13 states. [2019-01-08 14:09:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:09:44,905 INFO L93 Difference]: Finished difference Result 7179 states and 50083 transitions. [2019-01-08 14:09:44,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-01-08 14:09:44,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-08 14:09:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:09:44,934 INFO L225 Difference]: With dead ends: 7179 [2019-01-08 14:09:44,934 INFO L226 Difference]: Without dead ends: 7170 [2019-01-08 14:09:44,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2019-01-08 14:09:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2019-01-08 14:09:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 6542. [2019-01-08 14:09:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6542 states. [2019-01-08 14:09:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 46140 transitions. [2019-01-08 14:09:52,530 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 46140 transitions. Word has length 7 [2019-01-08 14:09:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:09:52,530 INFO L480 AbstractCegarLoop]: Abstraction has 6542 states and 46140 transitions. [2019-01-08 14:09:52,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-08 14:09:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 46140 transitions. [2019-01-08 14:09:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:09:52,539 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:09:52,539 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:09:52,539 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:09:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2015650778, now seen corresponding path program 1 times [2019-01-08 14:09:52,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:09:52,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:52,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:52,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:52,540 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:09:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:52,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:52,571 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:09:52,571 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:09:52,571 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [30], [32], [33] [2019-01-08 14:09:52,572 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:09:52,572 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:09:52,574 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:09:52,574 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:09:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:52,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:09:52,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:52,575 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:09:52,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:52,583 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:09:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:52,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:09:52,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2019-01-08 14:09:52,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-01-08 14:09:52,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2019-01-08 14:09:52,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 56 [2019-01-08 14:09:52,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2019-01-08 14:09:52,681 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,698 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,715 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,733 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,750 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:09:52,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:09:52,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-01-08 14:09:52,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-01-08 14:09:52,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 48 [2019-01-08 14:09:52,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:09:52,810 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,836 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,848 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,860 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,872 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,884 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:52,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:52,915 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:59, output treesize:67 [2019-01-08 14:09:52,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:52,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 79 [2019-01-08 14:09:52,971 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-08 14:09:53,256 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 20 dim-0 vars, and 8 xjuncts. [2019-01-08 14:09:53,256 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:333 [2019-01-08 14:09:53,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:53,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:53,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:53,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:53,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 42 [2019-01-08 14:09:53,325 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:53,339 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:09:53,339 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:18 [2019-01-08 14:09:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:53,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:09:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:53,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:09:53,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:09:53,383 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:09:53,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:09:53,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:09:53,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:09:53,384 INFO L87 Difference]: Start difference. First operand 6542 states and 46140 transitions. Second operand 8 states. [2019-01-08 14:10:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:10:03,884 INFO L93 Difference]: Finished difference Result 10441 states and 73753 transitions. [2019-01-08 14:10:03,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:10:03,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-08 14:10:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:10:03,920 INFO L225 Difference]: With dead ends: 10441 [2019-01-08 14:10:03,920 INFO L226 Difference]: Without dead ends: 10440 [2019-01-08 14:10:03,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:10:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2019-01-08 14:10:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10397. [2019-01-08 14:10:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10397 states. [2019-01-08 14:10:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10397 states to 10397 states and 73709 transitions. [2019-01-08 14:10:15,129 INFO L78 Accepts]: Start accepts. Automaton has 10397 states and 73709 transitions. Word has length 7 [2019-01-08 14:10:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:10:15,129 INFO L480 AbstractCegarLoop]: Abstraction has 10397 states and 73709 transitions. [2019-01-08 14:10:15,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:10:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10397 states and 73709 transitions. [2019-01-08 14:10:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:10:15,141 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:10:15,141 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:10:15,141 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:10:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:15,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2014341960, now seen corresponding path program 1 times [2019-01-08 14:10:15,141 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:10:15,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:15,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:15,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:15,142 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:10:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:10:15,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:15,293 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:10:15,293 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:10:15,293 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [28], [30], [31] [2019-01-08 14:10:15,294 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:10:15,294 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:10:15,295 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:10:15,295 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:10:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:15,296 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:10:15,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:15,296 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:10:15,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:15,307 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:10:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:15,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:10:15,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:10:15,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:10:15,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:10:15,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:10:15,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:10:15,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:10:15,357 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,395 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,417 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,435 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,449 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,463 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,490 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 63 treesize of output 56 [2019-01-08 14:10:15,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:10:15,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:10:15,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:10:15,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:10:15,684 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,707 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,731 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,756 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,782 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,825 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:15,826 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:10:15,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:10:15,859 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:15,900 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-08 14:10:15,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:15,937 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:10:15,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2019-01-08 14:10:15,939 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:15,983 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:15,984 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:55 [2019-01-08 14:10:16,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:16,024 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:10:16,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 108 [2019-01-08 14:10:16,034 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:10:16,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-08 14:10:16,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:102 [2019-01-08 14:10:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:18,223 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:10:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:18,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:10:18,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:10:18,284 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:10:18,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:10:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:10:18,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2019-01-08 14:10:18,285 INFO L87 Difference]: Start difference. First operand 10397 states and 73709 transitions. Second operand 10 states. [2019-01-08 14:10:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:10:29,240 INFO L93 Difference]: Finished difference Result 10427 states and 73743 transitions. [2019-01-08 14:10:29,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:10:29,240 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:10:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:10:29,277 INFO L225 Difference]: With dead ends: 10427 [2019-01-08 14:10:29,277 INFO L226 Difference]: Without dead ends: 10426 [2019-01-08 14:10:29,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=100, Invalid=171, Unknown=1, NotChecked=0, Total=272 [2019-01-08 14:10:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2019-01-08 14:10:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 10394. [2019-01-08 14:10:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10394 states. [2019-01-08 14:10:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10394 states to 10394 states and 73688 transitions. [2019-01-08 14:10:40,616 INFO L78 Accepts]: Start accepts. Automaton has 10394 states and 73688 transitions. Word has length 7 [2019-01-08 14:10:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:10:40,616 INFO L480 AbstractCegarLoop]: Abstraction has 10394 states and 73688 transitions. [2019-01-08 14:10:40,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:10:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 10394 states and 73688 transitions. [2019-01-08 14:10:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:10:40,627 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:10:40,627 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:10:40,627 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:10:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:40,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2026927280, now seen corresponding path program 1 times [2019-01-08 14:10:40,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:10:40,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:40,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:40,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:40,628 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:10:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:40,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:40,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:10:40,777 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:10:40,777 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [28], [29] [2019-01-08 14:10:40,778 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:10:40,778 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:10:40,780 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:10:40,780 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:10:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:40,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:10:40,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:40,780 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:10:40,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:40,797 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:10:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:40,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:10:40,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:10:40,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:10:40,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:10:40,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:10:40,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:10:40,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:10:40,839 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:40,864 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:40,886 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:40,902 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:40,916 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:40,929 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:40,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:10:40,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:40,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:10:41,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:10:41,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:10:41,056 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,072 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,087 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,103 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,134 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:41,134 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-01-08 14:10:41,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,184 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 [2019-01-08 14:10:41,184 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,202 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:41,202 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2019-01-08 14:10:41,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,231 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:10:41,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 60 [2019-01-08 14:10:41,232 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,251 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:41,251 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:29 [2019-01-08 14:10:41,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 61 [2019-01-08 14:10:41,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,310 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:41,310 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2019-01-08 14:10:41,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:41,345 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:10:41,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 75 [2019-01-08 14:10:41,346 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:41,367 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:10:41,368 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2019-01-08 14:10:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:41,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:10:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:41,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:10:41,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:10:41,463 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:10:41,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:10:41,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:10:41,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:10:41,464 INFO L87 Difference]: Start difference. First operand 10394 states and 73688 transitions. Second operand 12 states. [2019-01-08 14:10:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:10:53,648 INFO L93 Difference]: Finished difference Result 11408 states and 80747 transitions. [2019-01-08 14:10:53,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:10:53,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:10:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:10:53,691 INFO L225 Difference]: With dead ends: 11408 [2019-01-08 14:10:53,691 INFO L226 Difference]: Without dead ends: 11406 [2019-01-08 14:10:53,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:10:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2019-01-08 14:11:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 11270. [2019-01-08 14:11:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2019-01-08 14:11:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 80138 transitions. [2019-01-08 14:11:05,727 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 80138 transitions. Word has length 7 [2019-01-08 14:11:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:11:05,727 INFO L480 AbstractCegarLoop]: Abstraction has 11270 states and 80138 transitions. [2019-01-08 14:11:05,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:11:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 80138 transitions. [2019-01-08 14:11:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:11:05,739 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:11:05,739 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-08 14:11:05,739 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:11:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:05,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2023700554, now seen corresponding path program 2 times [2019-01-08 14:11:05,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:11:05,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:05,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:05,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:05,740 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:11:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:11:05,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:05,917 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:11:05,918 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:11:05,918 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:11:05,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:05,918 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:11:05,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:11:05,931 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:11:05,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-01-08 14:11:05,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:11:05,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:11:05,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:11:05,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:11:06,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:11:06,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:11:06,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,219 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-01-08 14:11:06,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:11:06,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,355 INFO L303 Elim1Store]: Index analysis took 133 ms [2019-01-08 14:11:06,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:11:06,356 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,396 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,420 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,438 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,451 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,465 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:11:06,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:11:06,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:11:06,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:11:06,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:06,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:11:06,935 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,960 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:06,985 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,010 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,035 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,078 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:07,078 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:11:07,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:11:07,116 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,157 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:07,157 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:11:07,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:11:07,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:07,237 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:11:07,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,352 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:11:07,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:11:07,354 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:07,402 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:49 [2019-01-08 14:11:07,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,441 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:11:07,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:11:07,444 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,492 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:07,493 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:43 [2019-01-08 14:11:07,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:07,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-01-08 14:11:07,541 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:07,593 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:07,593 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:41 [2019-01-08 14:11:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:07,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:11:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:07,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:11:07,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2019-01-08 14:11:07,708 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:11:07,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-08 14:11:07,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-08 14:11:07,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:11:07,709 INFO L87 Difference]: Start difference. First operand 11270 states and 80138 transitions. Second operand 13 states. [2019-01-08 14:11:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:11:23,591 INFO L93 Difference]: Finished difference Result 14692 states and 103813 transitions. [2019-01-08 14:11:23,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-08 14:11:23,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-08 14:11:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:11:23,649 INFO L225 Difference]: With dead ends: 14692 [2019-01-08 14:11:23,649 INFO L226 Difference]: Without dead ends: 14688 [2019-01-08 14:11:23,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:11:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14688 states. [2019-01-08 14:11:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14688 to 12758. [2019-01-08 14:11:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12758 states. [2019-01-08 14:11:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12758 states to 12758 states and 90546 transitions. [2019-01-08 14:11:37,885 INFO L78 Accepts]: Start accepts. Automaton has 12758 states and 90546 transitions. Word has length 7 [2019-01-08 14:11:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:11:37,886 INFO L480 AbstractCegarLoop]: Abstraction has 12758 states and 90546 transitions. [2019-01-08 14:11:37,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-08 14:11:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 12758 states and 90546 transitions. [2019-01-08 14:11:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:11:37,898 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:11:37,898 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:11:37,899 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:11:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2023160096, now seen corresponding path program 1 times [2019-01-08 14:11:37,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:11:37,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:37,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:11:37,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:37,900 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:11:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:38,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:38,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:11:38,199 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:11:38,199 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [28], [30], [31] [2019-01-08 14:11:38,200 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:11:38,200 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:11:38,202 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:11:38,202 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:11:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:38,202 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:11:38,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:38,203 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:11:38,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:38,215 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:11:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:38,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:11:38,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:11:38,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:11:38,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:11:38,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,279 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 28 treesize of output 50 [2019-01-08 14:11:38,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:11:38,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:11:38,300 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,338 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,360 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,377 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,391 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,405 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:11:38,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:11:38,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:11:38,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:11:38,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:11:38,613 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,637 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,661 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,686 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,713 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:38,757 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:11:38,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-08 14:11:38,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:38,828 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-08 14:11:38,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 109 [2019-01-08 14:11:38,868 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:38,913 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:38,914 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-08 14:11:38,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,975 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:11:38,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:38,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:11:38,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:39,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:11:39,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2019-01-08 14:11:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:39,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:11:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:39,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:11:39,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:11:39,154 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:11:39,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:11:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:11:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:11:39,154 INFO L87 Difference]: Start difference. First operand 12758 states and 90546 transitions. Second operand 10 states. [2019-01-08 14:11:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:11:52,929 INFO L93 Difference]: Finished difference Result 13016 states and 92075 transitions. [2019-01-08 14:11:52,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:11:52,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:11:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:11:52,978 INFO L225 Difference]: With dead ends: 13016 [2019-01-08 14:11:52,978 INFO L226 Difference]: Without dead ends: 13015 [2019-01-08 14:11:52,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:11:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13015 states. [2019-01-08 14:12:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13015 to 12958. [2019-01-08 14:12:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2019-01-08 14:12:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2019-01-08 14:12:07,005 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2019-01-08 14:12:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:12:07,005 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2019-01-08 14:12:07,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:12:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2019-01-08 14:12:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:12:07,018 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:12:07,018 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-08 14:12:07,018 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:12:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1920990370, now seen corresponding path program 1 times [2019-01-08 14:12:07,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:12:07,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:07,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:07,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:07,020 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:12:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:12:07,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:07,072 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:12:07,072 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:12:07,072 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [30], [32], [33] [2019-01-08 14:12:07,073 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:12:07,073 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:12:07,074 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:12:07,075 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:12:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:07,075 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:12:07,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:07,075 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:12:07,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:07,088 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:12:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:07,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:12:07,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:12:07,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:12:07,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:12:07,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:12:07,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:12:07,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:12:07,131 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,157 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,177 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,193 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,205 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,218 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:12:07,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:12:07,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:12:07,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:12:07,343 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,358 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,373 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,389 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,420 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:12:07,421 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-08 14:12:07,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:12:07,468 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:12:07,561 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:12:07,562 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-01-08 14:12:07,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:07,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:12:07,607 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:07,628 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:12:07,628 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:33 [2019-01-08 14:12:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:07,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:12:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:07,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:12:07,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-08 14:12:07,681 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:12:07,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-08 14:12:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-08 14:12:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:12:07,682 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 7 states. [2019-01-08 14:12:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:12:21,051 INFO L93 Difference]: Finished difference Result 12974 states and 91967 transitions. [2019-01-08 14:12:21,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:12:21,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-01-08 14:12:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:12:21,104 INFO L225 Difference]: With dead ends: 12974 [2019-01-08 14:12:21,104 INFO L226 Difference]: Without dead ends: 12973 [2019-01-08 14:12:21,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:12:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12973 states. [2019-01-08 14:12:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12973 to 12958. [2019-01-08 14:12:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2019-01-08 14:12:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2019-01-08 14:12:35,462 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2019-01-08 14:12:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:12:35,462 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2019-01-08 14:12:35,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-08 14:12:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2019-01-08 14:12:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:12:35,473 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:12:35,473 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:12:35,473 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:12:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1935645556, now seen corresponding path program 1 times [2019-01-08 14:12:35,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:12:35,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:35,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:35,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:35,474 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:12:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:12:35,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:35,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:12:35,564 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:12:35,564 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [30], [31] [2019-01-08 14:12:35,565 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:12:35,565 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:12:35,567 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:12:35,567 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:12:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:35,567 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:12:35,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:35,568 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:12:35,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:35,579 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:12:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:35,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:12:35,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:12:35,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:12:35,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:12:35,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:12:35,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,614 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:12:35,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:12:35,624 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,664 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,684 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,702 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,715 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,729 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:12:35,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:12:35,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:12:35,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:12:35,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:35,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:12:35,944 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,966 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:35,991 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:36,015 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:36,042 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:36,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:12:36,090 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:12:36,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:12:36,132 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:12:36,282 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:12:36,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2019-01-08 14:12:36,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,342 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:12:36,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:12:36,343 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:36,379 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:12:36,379 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2019-01-08 14:12:36,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:36,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:12:36,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:36,444 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:12:36,444 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2019-01-08 14:12:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:36,469 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:12:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:36,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:12:36,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:12:36,538 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:12:36,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:12:36,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:12:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:12:36,539 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 10 states. [2019-01-08 14:12:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:12:50,803 INFO L93 Difference]: Finished difference Result 13106 states and 92752 transitions. [2019-01-08 14:12:50,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:12:50,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:12:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:12:50,856 INFO L225 Difference]: With dead ends: 13106 [2019-01-08 14:12:50,857 INFO L226 Difference]: Without dead ends: 13105 [2019-01-08 14:12:50,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:12:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13105 states. [2019-01-08 14:13:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13105 to 13023. [2019-01-08 14:13:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13023 states. [2019-01-08 14:13:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13023 states to 13023 states and 92401 transitions. [2019-01-08 14:13:05,082 INFO L78 Accepts]: Start accepts. Automaton has 13023 states and 92401 transitions. Word has length 7 [2019-01-08 14:13:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:13:05,082 INFO L480 AbstractCegarLoop]: Abstraction has 13023 states and 92401 transitions. [2019-01-08 14:13:05,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:13:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13023 states and 92401 transitions. [2019-01-08 14:13:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:13:05,093 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:13:05,093 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:13:05,093 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:13:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1935632038, now seen corresponding path program 1 times [2019-01-08 14:13:05,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:13:05,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:05,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:05,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:05,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:13:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:13:05,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:05,177 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:13:05,177 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:13:05,177 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [24], [28], [29] [2019-01-08 14:13:05,178 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:13:05,178 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:13:05,179 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:13:05,179 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:13:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:05,179 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:13:05,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:05,180 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:13:05,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:05,188 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:13:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:05,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:13:05,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:13:05,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:13:05,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:13:05,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:13:05,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:13:05,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:13:05,246 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,287 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,311 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,330 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,342 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,355 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:13:05,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:13:05,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:13:05,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:13:05,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:13:05,608 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,634 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,660 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,687 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,714 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,760 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:05,760 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:13:05,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:13:05,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,852 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:05,853 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:13:05,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,918 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:13:05,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:13:05,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:05,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:05,965 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2019-01-08 14:13:05,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:05,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:13:06,008 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:06,057 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:06,057 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2019-01-08 14:13:06,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:06,105 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:13:06,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:13:06,106 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:06,155 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:06,155 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2019-01-08 14:13:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:06,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:13:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:06,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:13:06,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:13:06,271 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:13:06,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:13:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:13:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:13:06,271 INFO L87 Difference]: Start difference. First operand 13023 states and 92401 transitions. Second operand 12 states. [2019-01-08 14:13:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:13:20,486 INFO L93 Difference]: Finished difference Result 13278 states and 93926 transitions. [2019-01-08 14:13:20,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:13:20,486 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:13:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:13:20,536 INFO L225 Difference]: With dead ends: 13278 [2019-01-08 14:13:20,536 INFO L226 Difference]: Without dead ends: 13277 [2019-01-08 14:13:20,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:13:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2019-01-08 14:13:34,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13233. [2019-01-08 14:13:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13233 states. [2019-01-08 14:13:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13233 states to 13233 states and 93871 transitions. [2019-01-08 14:13:35,004 INFO L78 Accepts]: Start accepts. Automaton has 13233 states and 93871 transitions. Word has length 7 [2019-01-08 14:13:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:13:35,004 INFO L480 AbstractCegarLoop]: Abstraction has 13233 states and 93871 transitions. [2019-01-08 14:13:35,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:13:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 13233 states and 93871 transitions. [2019-01-08 14:13:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:13:35,015 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:13:35,015 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:13:35,016 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:13:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1935214964, now seen corresponding path program 1 times [2019-01-08 14:13:35,016 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:13:35,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:35,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:35,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:35,017 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:13:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:35,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:35,173 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:13:35,173 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:13:35,173 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [22], [28], [29] [2019-01-08 14:13:35,174 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:13:35,174 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:13:35,175 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:13:35,176 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:13:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:35,176 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:13:35,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:35,176 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:13:35,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:35,187 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:13:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:35,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:13:35,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:13:35,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:13:35,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:13:35,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:13:35,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:13:35,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:13:35,253 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,281 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,304 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,322 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,337 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,350 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:13:35,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:13:35,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:13:35,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:13:35,504 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,521 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,537 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,553 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,586 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:35,587 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:13:35,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:13:35,642 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,672 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:35,672 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-08 14:13:35,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,708 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:13:35,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:13:35,710 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,740 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:35,740 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2019-01-08 14:13:35,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-08 14:13:35,775 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:35,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2019-01-08 14:13:35,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:35,842 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:13:35,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-08 14:13:35,843 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:35,878 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:13:35,878 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2019-01-08 14:13:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:37,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:13:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:37,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:13:37,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2019-01-08 14:13:37,903 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:13:37,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-08 14:13:37,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-08 14:13:37,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:13:37,904 INFO L87 Difference]: Start difference. First operand 13233 states and 93871 transitions. Second operand 13 states. [2019-01-08 14:13:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:13:55,926 INFO L93 Difference]: Finished difference Result 17581 states and 124519 transitions. [2019-01-08 14:13:55,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:13:55,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-08 14:13:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:13:56,005 INFO L225 Difference]: With dead ends: 17581 [2019-01-08 14:13:56,005 INFO L226 Difference]: Without dead ends: 17580 [2019-01-08 14:13:56,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:13:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17580 states. [2019-01-08 14:14:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17580 to 9927. [2019-01-08 14:14:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2019-01-08 14:14:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2019-01-08 14:14:07,899 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2019-01-08 14:14:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:14:07,899 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2019-01-08 14:14:07,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-08 14:14:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2019-01-08 14:14:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:14:07,908 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:14:07,908 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:14:07,908 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:14:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:07,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1935766706, now seen corresponding path program 1 times [2019-01-08 14:14:07,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:14:07,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:07,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:07,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:07,909 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:14:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:14:07,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:07,969 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:14:07,969 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:14:07,969 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [30], [32], [33] [2019-01-08 14:14:07,970 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:14:07,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:14:07,971 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:14:07,971 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:14:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:07,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:14:07,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:07,972 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:14:07,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:07,981 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:14:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:07,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:14:07,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:14:07,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:14:07,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:07,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:14:08,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:14:08,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:14:08,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:14:08,028 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,068 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,089 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,106 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,118 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,132 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:14:08,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:14:08,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:14:08,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:14:08,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:14:08,346 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,371 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,395 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,420 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,447 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,491 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:14:08,492 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:14:08,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:14:08,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:14:08,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:14:08,671 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-01-08 14:14:08,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:08,734 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:14:08,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:14:08,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:08,767 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:14:08,768 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:42 [2019-01-08 14:14:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:08,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:14:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:08,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:14:08,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:14:08,831 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:14:08,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:14:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:14:08,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:14:08,832 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 8 states. [2019-01-08 14:14:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:14:19,975 INFO L93 Difference]: Finished difference Result 9947 states and 70395 transitions. [2019-01-08 14:14:19,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:14:19,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-08 14:14:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:14:20,013 INFO L225 Difference]: With dead ends: 9947 [2019-01-08 14:14:20,013 INFO L226 Difference]: Without dead ends: 9946 [2019-01-08 14:14:20,015 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:14:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9946 states. [2019-01-08 14:14:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9946 to 9927. [2019-01-08 14:14:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2019-01-08 14:14:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2019-01-08 14:14:31,196 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2019-01-08 14:14:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:14:31,197 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2019-01-08 14:14:31,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:14:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2019-01-08 14:14:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:14:31,205 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:14:31,205 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-08 14:14:31,205 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:14:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1937303618, now seen corresponding path program 3 times [2019-01-08 14:14:31,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:14:31,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:31,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:31,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:31,206 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:14:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:14:31,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:31,280 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:14:31,280 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:14:31,280 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:14:31,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:31,280 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:14:31,291 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:14:31,291 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:14:31,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:14:31,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:14:31,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:14:31,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:14:31,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:14:31,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,326 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 26 treesize of output 40 [2019-01-08 14:14:31,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:14:31,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:14:31,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-08 14:14:31,354 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,384 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,406 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,423 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,438 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,452 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-08 14:14:31,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-08 14:14:31,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-08 14:14:31,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:14:31,604 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,620 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,636 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,653 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:31,686 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:14:31,686 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-08 14:14:31,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:31,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-08 14:14:31,813 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:14:31,920 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2019-01-08 14:14:31,920 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:109 [2019-01-08 14:14:32,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,037 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:14:32,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2019-01-08 14:14:32,038 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:32,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2019-01-08 14:14:32,164 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2019-01-08 14:14:32,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 6 xjuncts. [2019-01-08 14:14:32,486 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:280 [2019-01-08 14:14:32,642 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2019-01-08 14:14:32,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,658 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:14:32,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 93 [2019-01-08 14:14:32,659 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:32,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-08 14:14:32,805 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:32,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:32,957 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:14:32,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 113 [2019-01-08 14:14:32,958 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:33,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2019-01-08 14:14:33,090 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:33,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2019-01-08 14:14:33,176 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:227, output treesize:161 [2019-01-08 14:14:33,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 78 [2019-01-08 14:14:33,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:33,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-08 14:14:33,393 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:33,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 108 [2019-01-08 14:14:33,531 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:33,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 100 [2019-01-08 14:14:33,666 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:33,767 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2019-01-08 14:14:33,767 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:209, output treesize:153 [2019-01-08 14:14:33,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:33,876 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:14:33,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 123 [2019-01-08 14:14:33,878 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:34,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 118 [2019-01-08 14:14:34,030 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:34,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,175 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:14:34,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 125 [2019-01-08 14:14:34,178 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:34,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:34,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2019-01-08 14:14:34,303 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:34,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2019-01-08 14:14:34,387 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:201, output treesize:141 [2019-01-08 14:14:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:34,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:14:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:34,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:14:34,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2019-01-08 14:14:34,668 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:14:34,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-08 14:14:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-08 14:14:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:14:34,669 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 13 states. [2019-01-08 14:14:34,878 WARN L181 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-01-08 14:14:35,172 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-01-08 14:14:35,473 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2019-01-08 14:14:36,743 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2019-01-08 14:14:38,294 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2019-01-08 14:14:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:14:51,452 INFO L93 Difference]: Finished difference Result 12394 states and 87417 transitions. [2019-01-08 14:14:51,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-08 14:14:51,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-08 14:14:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:14:51,502 INFO L225 Difference]: With dead ends: 12394 [2019-01-08 14:14:51,503 INFO L226 Difference]: Without dead ends: 12392 [2019-01-08 14:14:51,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-01-08 14:14:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2019-01-08 14:15:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 7195. [2019-01-08 14:15:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2019-01-08 14:15:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 51194 transitions. [2019-01-08 14:15:01,197 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 51194 transitions. Word has length 7 [2019-01-08 14:15:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:15:01,197 INFO L480 AbstractCegarLoop]: Abstraction has 7195 states and 51194 transitions. [2019-01-08 14:15:01,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-08 14:15:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 51194 transitions. [2019-01-08 14:15:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:15:01,203 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:15:01,203 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:15:01,203 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:15:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:15:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1937075524, now seen corresponding path program 1 times [2019-01-08 14:15:01,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:15:01,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:15:01,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:15:01,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:15:01,204 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:15:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:15:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:15:01,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:15:01,288 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:15:01,288 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:15:01,288 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [28], [30], [31] [2019-01-08 14:15:01,289 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:15:01,289 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:15:01,290 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:15:01,290 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:15:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:15:01,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:15:01,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:15:01,291 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:15:01,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:15:01,302 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:15:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:15:01,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:15:01,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:15:01,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:15:01,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:15:01,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:15:01,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:15:01,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:15:01,354 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,393 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,415 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,432 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,446 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,460 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:15:01,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:15:01,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:15:01,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:15:01,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:15:01,675 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,699 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,723 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,746 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,771 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:01,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:01,812 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:15:01,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:01,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:15:01,857 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:15:02,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:15:02,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2019-01-08 14:15:02,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 90 [2019-01-08 14:15:02,114 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:02,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 127 [2019-01-08 14:15:02,211 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:02,293 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:15:02,294 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:150, output treesize:94 [2019-01-08 14:15:02,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,346 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:15:02,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-08 14:15:02,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:02,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,437 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:15:02,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:02,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 138 [2019-01-08 14:15:02,440 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:02,528 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-08 14:15:02,528 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:118, output treesize:100 [2019-01-08 14:15:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:15:02,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:15:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:15:02,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:15:02,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:15:02,660 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:15:02,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:15:02,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:15:02,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:15:02,660 INFO L87 Difference]: Start difference. First operand 7195 states and 51194 transitions. Second operand 10 states. [2019-01-08 14:15:03,078 WARN L181 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2019-01-08 14:15:04,830 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-01-08 14:15:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:15:13,497 INFO L93 Difference]: Finished difference Result 7367 states and 52064 transitions. [2019-01-08 14:15:13,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:15:13,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:15:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:15:13,519 INFO L225 Difference]: With dead ends: 7367 [2019-01-08 14:15:13,519 INFO L226 Difference]: Without dead ends: 7366 [2019-01-08 14:15:13,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:15:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2019-01-08 14:15:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7259. [2019-01-08 14:15:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2019-01-08 14:15:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 51642 transitions. [2019-01-08 14:15:23,672 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 51642 transitions. Word has length 7 [2019-01-08 14:15:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:15:23,672 INFO L480 AbstractCegarLoop]: Abstraction has 7259 states and 51642 transitions. [2019-01-08 14:15:23,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:15:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 51642 transitions. [2019-01-08 14:15:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:15:23,678 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:15:23,678 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:15:23,678 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:15:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:15:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1924490204, now seen corresponding path program 2 times [2019-01-08 14:15:23,679 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:15:23,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:15:23,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:15:23,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:15:23,679 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:15:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:15:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:15:23,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:15:23,826 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:15:23,826 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:15:23,826 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:15:23,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:15:23,826 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:15:23,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:15:23,834 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:15:23,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:15:23,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:15:23,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:15:23,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:15:23,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:15:23,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:15:23,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:15:23,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:15:23,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:23,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:15:23,894 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:23,934 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:23,957 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:23,976 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:23,991 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,002 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:15:24,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:15:24,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:15:24,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:15:24,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:15:24,251 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,278 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,303 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,329 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,354 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:24,402 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-08 14:15:24,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:15:24,441 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,487 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. [2019-01-08 14:15:24,487 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:15:24,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:15:24,526 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,576 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:24,576 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:15:24,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,619 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:15:24,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:15:24,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,670 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:24,670 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:15:24,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:24,711 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:15:24,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:15:24,712 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:24,762 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:24,762 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2019-01-08 14:15:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:15:24,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:15:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:15:24,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:15:24,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-01-08 14:15:24,858 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:15:24,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:15:24,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:15:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:15:24,858 INFO L87 Difference]: Start difference. First operand 7259 states and 51642 transitions. Second operand 11 states. [2019-01-08 14:15:25,640 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-01-08 14:15:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:15:42,500 INFO L93 Difference]: Finished difference Result 9936 states and 70364 transitions. [2019-01-08 14:15:42,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:15:42,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:15:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:15:42,536 INFO L225 Difference]: With dead ends: 9936 [2019-01-08 14:15:42,536 INFO L226 Difference]: Without dead ends: 9935 [2019-01-08 14:15:42,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:15:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2019-01-08 14:15:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 8951. [2019-01-08 14:15:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8951 states. [2019-01-08 14:15:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8951 states to 8951 states and 63743 transitions. [2019-01-08 14:15:57,774 INFO L78 Accepts]: Start accepts. Automaton has 8951 states and 63743 transitions. Word has length 7 [2019-01-08 14:15:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:15:57,774 INFO L480 AbstractCegarLoop]: Abstraction has 8951 states and 63743 transitions. [2019-01-08 14:15:57,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:15:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 8951 states and 63743 transitions. [2019-01-08 14:15:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:15:57,782 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:15:57,782 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:15:57,782 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:15:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:15:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1928257388, now seen corresponding path program 1 times [2019-01-08 14:15:57,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:15:57,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:15:57,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:15:57,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:15:57,783 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:15:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:15:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:15:57,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:15:57,893 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:15:57,894 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:15:57,894 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [30], [31] [2019-01-08 14:15:57,894 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:15:57,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:15:57,896 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:15:57,896 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:15:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:15:57,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:15:57,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:15:57,897 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:15:57,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:15:57,906 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:15:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:15:57,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:15:57,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:15:57,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:57,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:57,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:15:57,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:57,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:57,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:57,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:57,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:15:58,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:15:58,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:15:58,104 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,128 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,154 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,179 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,208 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:15:58,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:15:58,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:15:58,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:15:58,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:15:58,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:15:58,260 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,292 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,311 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,326 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,338 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,351 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,394 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:58,395 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-08 14:15:58,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:15:58,436 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:15:58,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:15:58,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-01-08 14:15:58,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,635 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:15:58,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-08 14:15:58,637 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,668 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:58,668 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2019-01-08 14:15:58,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:15:58,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-08 14:15:58,699 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:15:58,730 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:15:58,730 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2019-01-08 14:15:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:15:58,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:15:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:15:58,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:15:58,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:15:58,798 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:15:58,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:15:58,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:15:58,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:15:58,799 INFO L87 Difference]: Start difference. First operand 8951 states and 63743 transitions. Second operand 10 states. [2019-01-08 14:16:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:16:14,677 INFO L93 Difference]: Finished difference Result 9235 states and 65371 transitions. [2019-01-08 14:16:14,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:16:14,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:16:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:16:14,711 INFO L225 Difference]: With dead ends: 9235 [2019-01-08 14:16:14,711 INFO L226 Difference]: Without dead ends: 9232 [2019-01-08 14:16:14,714 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:16:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2019-01-08 14:16:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 9044. [2019-01-08 14:16:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9044 states. [2019-01-08 14:16:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 64394 transitions. [2019-01-08 14:16:30,760 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 64394 transitions. Word has length 7 [2019-01-08 14:16:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:16:30,760 INFO L480 AbstractCegarLoop]: Abstraction has 9044 states and 64394 transitions. [2019-01-08 14:16:30,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:16:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 64394 transitions. [2019-01-08 14:16:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:16:30,768 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:16:30,768 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:16:30,768 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:16:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:16:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1928378538, now seen corresponding path program 1 times [2019-01-08 14:16:30,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:16:30,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:16:30,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:16:30,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:16:30,769 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:16:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:16:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:16:30,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:16:30,840 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:16:30,841 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:16:30,841 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [30], [32], [33] [2019-01-08 14:16:30,841 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:16:30,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:16:30,843 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:16:30,843 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:16:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:16:30,844 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:16:30,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:16:30,844 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:16:30,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:16:30,858 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:16:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:16:30,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:16:30,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:16:30,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:16:30,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:16:30,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:30,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:16:30,991 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,007 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,023 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,040 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:16:31,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:16:31,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:16:31,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:16:31,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:16:31,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:16:31,089 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,113 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,132 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,145 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,158 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,170 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,201 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:16:31,201 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-08 14:16:31,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:31,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-08 14:16:31,253 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:16:31,347 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:16:31,348 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-01-08 14:16:31,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:31,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:31,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:31,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:16:31,396 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:16:31,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2019-01-08 14:16:31,397 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:16:31,418 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:16:31,418 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:29 [2019-01-08 14:16:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:16:31,435 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:16:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:16:31,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:16:31,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:16:31,476 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:16:31,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:16:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:16:31,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:16:31,476 INFO L87 Difference]: Start difference. First operand 9044 states and 64394 transitions. Second operand 8 states. [2019-01-08 14:16:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:16:46,572 INFO L93 Difference]: Finished difference Result 9065 states and 64420 transitions. [2019-01-08 14:16:46,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:16:46,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-08 14:16:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:16:46,605 INFO L225 Difference]: With dead ends: 9065 [2019-01-08 14:16:46,605 INFO L226 Difference]: Without dead ends: 9064 [2019-01-08 14:16:46,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:16:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2019-01-08 14:17:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 9045. [2019-01-08 14:17:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9045 states. [2019-01-08 14:17:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 64401 transitions. [2019-01-08 14:17:02,661 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 64401 transitions. Word has length 7 [2019-01-08 14:17:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:17:02,661 INFO L480 AbstractCegarLoop]: Abstraction has 9045 states and 64401 transitions. [2019-01-08 14:17:02,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:17:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 64401 transitions. [2019-01-08 14:17:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:17:02,670 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:17:02,670 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:17:02,670 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:17:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:17:02,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1904967206, now seen corresponding path program 1 times [2019-01-08 14:17:02,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:17:02,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:17:02,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:17:02,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:17:02,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:17:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:17:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:17:02,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:17:02,753 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:17:02,753 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:17:02,753 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [24], [27] [2019-01-08 14:17:02,754 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:17:02,754 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:17:02,755 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:17:02,755 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:17:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:17:02,756 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:17:02,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:17:02,756 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:17:02,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:17:02,766 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:17:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:17:02,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:17:02,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:17:02,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:17:02,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:17:02,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:02,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:17:03,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:17:03,028 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,059 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,090 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,121 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,154 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:17:03,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:17:03,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:17:03,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:17:03,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:17:03,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:17:03,214 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,255 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,276 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,292 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,306 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,318 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,367 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:92, output treesize:91 [2019-01-08 14:17:03,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:17:03,421 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,465 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:03,465 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:71 [2019-01-08 14:17:03,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:17:03,548 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:03,610 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:55 [2019-01-08 14:17:03,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,657 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:17:03,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:17:03,659 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:03,711 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:47 [2019-01-08 14:17:03,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,756 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:17:03,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-08 14:17:03,758 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,809 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:03,809 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:49 [2019-01-08 14:17:03,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:03,857 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:17:03,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 127 [2019-01-08 14:17:03,859 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:03,910 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:03,910 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:53 [2019-01-08 14:17:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:17:03,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:17:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:17:04,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:17:04,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-08 14:17:04,069 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:17:04,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-08 14:17:04,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-08 14:17:04,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:17:04,069 INFO L87 Difference]: Start difference. First operand 9045 states and 64401 transitions. Second operand 14 states. [2019-01-08 14:17:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:17:23,441 INFO L93 Difference]: Finished difference Result 9411 states and 66754 transitions. [2019-01-08 14:17:23,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:17:23,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2019-01-08 14:17:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:17:23,480 INFO L225 Difference]: With dead ends: 9411 [2019-01-08 14:17:23,480 INFO L226 Difference]: Without dead ends: 9409 [2019-01-08 14:17:23,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-01-08 14:17:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9409 states. [2019-01-08 14:17:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9409 to 8693. [2019-01-08 14:17:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8693 states. [2019-01-08 14:17:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 61400 transitions. [2019-01-08 14:17:39,431 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 61400 transitions. Word has length 7 [2019-01-08 14:17:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:17:39,431 INFO L480 AbstractCegarLoop]: Abstraction has 8693 states and 61400 transitions. [2019-01-08 14:17:39,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-08 14:17:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 61400 transitions. [2019-01-08 14:17:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:17:39,440 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:17:39,440 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:17:39,440 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:17:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:17:39,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1916458534, now seen corresponding path program 1 times [2019-01-08 14:17:39,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:17:39,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:17:39,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:17:39,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:17:39,441 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:17:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:17:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:17:39,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:17:39,587 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:17:39,587 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:17:39,587 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [24], [27] [2019-01-08 14:17:39,588 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:17:39,588 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:17:39,589 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:17:39,589 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:17:39,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:17:39,590 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:17:39,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:17:39,590 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:17:39,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:17:39,598 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:17:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:17:39,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:17:39,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:17:39,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:17:39,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:17:39,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:17:39,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:39,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:17:39,845 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:39,873 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:39,900 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:39,928 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:39,956 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:39,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:17:39,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-08 14:17:39,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-08 14:17:40,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-08 14:17:40,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-08 14:17:40,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-08 14:17:40,007 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,042 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,063 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,079 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,093 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,104 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,150 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:40,150 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-08 14:17:40,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:17:40,199 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,243 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:40,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:17:40,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,287 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:17:40,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:17:40,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,333 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:40,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:59 [2019-01-08 14:17:40,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:17:40,377 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,423 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:40,423 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:47 [2019-01-08 14:17:40,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,473 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:17:40,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2019-01-08 14:17:40,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:40,525 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:45 [2019-01-08 14:17:40,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,572 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:17:40,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:17:40,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2019-01-08 14:17:40,574 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:17:40,623 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:17:40,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:49 [2019-01-08 14:17:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:17:40,654 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:17:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:17:40,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:17:40,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-08 14:17:40,753 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:17:40,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-08 14:17:40,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-08 14:17:40,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:17:40,754 INFO L87 Difference]: Start difference. First operand 8693 states and 61400 transitions. Second operand 14 states. [2019-01-08 14:17:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:17:58,067 INFO L93 Difference]: Finished difference Result 8797 states and 61626 transitions. [2019-01-08 14:17:58,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:17:58,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2019-01-08 14:17:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:17:58,100 INFO L225 Difference]: With dead ends: 8797 [2019-01-08 14:17:58,100 INFO L226 Difference]: Without dead ends: 8791 [2019-01-08 14:17:58,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2019-01-08 14:17:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2019-01-08 14:18:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 1900. [2019-01-08 14:18:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1900 states. [2019-01-08 14:18:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 13072 transitions. [2019-01-08 14:18:07,003 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 13072 transitions. Word has length 7 [2019-01-08 14:18:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:18:07,004 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 13072 transitions. [2019-01-08 14:18:07,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-08 14:18:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 13072 transitions. [2019-01-08 14:18:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:18:07,007 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:18:07,007 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:18:07,007 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:18:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:18:07,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1899825356, now seen corresponding path program 1 times [2019-01-08 14:18:07,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:18:07,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:18:07,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:18:07,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:18:07,008 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:18:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:18:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:18:07,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:18:07,093 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:18:07,093 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:18:07,094 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [30], [31] [2019-01-08 14:18:07,094 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:18:07,095 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:18:07,096 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:18:07,096 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:18:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:18:07,096 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:18:07,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:18:07,097 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:18:07,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:18:07,104 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:18:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:18:07,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:18:07,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-08 14:18:07,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-08 14:18:07,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-08 14:18:07,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-08 14:18:07,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:18:07,302 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,328 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,354 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,380 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,408 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:18:07,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:18:07,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:18:07,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:18:07,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:18:07,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-08 14:18:07,461 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,495 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,515 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,530 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,542 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,554 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,598 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:18:07,598 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-08 14:18:07,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-08 14:18:07,634 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:18:07,678 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-08 14:18:07,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2019-01-08 14:18:07,717 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:07,762 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:18:07,762 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2019-01-08 14:18:07,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:07,805 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:18:07,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 134 [2019-01-08 14:18:07,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:18:07,982 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-08 14:18:07,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:90 [2019-01-08 14:18:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:18:08,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:18:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:18:08,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:18:08,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:18:08,084 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:18:08,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:18:08,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:18:08,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:18:08,085 INFO L87 Difference]: Start difference. First operand 1900 states and 13072 transitions. Second operand 10 states. [2019-01-08 14:18:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:18:18,829 INFO L93 Difference]: Finished difference Result 1963 states and 13288 transitions. [2019-01-08 14:18:18,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:18:18,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:18:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:18:18,836 INFO L225 Difference]: With dead ends: 1963 [2019-01-08 14:18:18,836 INFO L226 Difference]: Without dead ends: 1962 [2019-01-08 14:18:18,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:18:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2019-01-08 14:18:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1925. [2019-01-08 14:18:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2019-01-08 14:18:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 13247 transitions. [2019-01-08 14:18:27,556 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 13247 transitions. Word has length 7 [2019-01-08 14:18:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:18:27,556 INFO L480 AbstractCegarLoop]: Abstraction has 1925 states and 13247 transitions. [2019-01-08 14:18:27,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:18:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 13247 transitions. [2019-01-08 14:18:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:18:27,560 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:18:27,561 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:18:27,561 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:18:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:18:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1912516322, now seen corresponding path program 1 times [2019-01-08 14:18:27,561 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:18:27,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:18:27,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:18:27,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:18:27,562 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:18:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:18:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:18:27,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:18:27,724 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:18:27,724 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:18:27,724 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [28], [30], [31] [2019-01-08 14:18:27,725 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:18:27,725 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:18:27,727 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:18:27,727 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:18:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:18:27,728 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:18:27,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:18:27,728 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:18:27,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:18:27,739 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:18:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:18:27,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:18:27,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-08 14:18:27,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-08 14:18:27,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-08 14:18:27,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-08 14:18:27,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-08 14:18:27,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-08 14:18:27,781 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:27,809 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:27,829 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:27,843 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:27,857 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:27,870 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:27,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-08 14:18:27,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-08 14:18:27,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-08 14:18:27,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:27,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:18:27,991 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:28,007 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:28,022 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:28,038 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:18:28,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:18:28,069 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-01-08 14:18:28,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2019-01-08 14:18:28,117 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:28,137 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:18:28,137 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2019-01-08 14:18:28,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,165 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 [2019-01-08 14:18:28,166 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:28,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:18:28,189 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:25 [2019-01-08 14:18:28,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:18:28,223 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:18:28,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-08 14:18:28,224 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:18:28,249 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:18:28,249 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2019-01-08 14:18:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:18:28,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:18:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:18:28,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:18:28,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2019-01-08 14:18:28,333 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:18:28,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:18:28,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:18:28,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:18:28,334 INFO L87 Difference]: Start difference. First operand 1925 states and 13247 transitions. Second operand 11 states.