java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-07 21:41:50,829 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-07 21:41:50,832 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-07 21:41:50,847 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-07 21:41:50,847 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-07 21:41:50,849 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-07 21:41:50,850 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-07 21:41:50,852 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-07 21:41:50,853 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-07 21:41:50,854 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-07 21:41:50,855 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-07 21:41:50,855 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-07 21:41:50,856 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-07 21:41:50,857 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-07 21:41:50,858 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-07 21:41:50,859 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-07 21:41:50,860 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-07 21:41:50,862 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-07 21:41:50,864 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-07 21:41:50,865 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-07 21:41:50,866 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-07 21:41:50,868 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-07 21:41:50,870 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-07 21:41:50,870 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-07 21:41:50,870 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-07 21:41:50,871 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-07 21:41:50,872 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-07 21:41:50,873 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-07 21:41:50,874 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-07 21:41:50,875 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-07 21:41:50,875 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-07 21:41:50,876 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-07 21:41:50,876 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-07 21:41:50,877 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-07 21:41:50,878 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-07 21:41:50,878 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-07 21:41:50,879 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 [2019-01-07 21:41:50,896 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-07 21:41:50,896 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-07 21:41:50,897 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-07 21:41:50,897 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-07 21:41:50,898 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-07 21:41:50,898 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-07 21:41:50,898 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-07 21:41:50,898 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-07 21:41:50,898 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-07 21:41:50,898 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-07 21:41:50,899 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-07 21:41:50,899 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-07 21:41:50,899 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-07 21:41:50,899 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-07 21:41:50,900 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-07 21:41:50,900 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-07 21:41:50,900 INFO L133 SettingsManager]: * Use SBE=true [2019-01-07 21:41:50,901 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-07 21:41:50,901 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-07 21:41:50,901 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-07 21:41:50,901 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-07 21:41:50,901 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-07 21:41:50,902 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-07 21:41:50,902 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-07 21:41:50,902 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-07 21:41:50,902 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-07 21:41:50,902 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-07 21:41:50,903 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-07 21:41:50,907 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-07 21:41:50,908 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-07 21:41:50,908 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-07 21:41:50,908 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 21:41:50,908 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-07 21:41:50,908 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-07 21:41:50,909 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-07 21:41:50,909 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-07 21:41:50,909 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-07 21:41:50,909 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-07 21:41:50,909 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-07 21:41:50,911 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-07 21:41:50,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-07 21:41:50,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-07 21:41:50,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-07 21:41:50,984 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-07 21:41:50,985 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-07 21:41:50,985 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-07 21:41:50,986 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-07 21:41:51,039 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-07 21:41:51,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-07 21:41:51,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-07 21:41:51,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-07 21:41:51,045 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-07 21:41:51,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-07 21:41:51,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-07 21:41:51,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-07 21:41:51,126 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-07 21:41:51,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... [2019-01-07 21:41:51,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-07 21:41:51,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-07 21:41:51,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-07 21:41:51,171 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-07 21:41:51,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 21:41:51,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-07 21:41:51,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-07 21:41:51,670 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-07 21:41:51,670 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-07 21:41:51,672 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 09:41:51 BoogieIcfgContainer [2019-01-07 21:41:51,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-07 21:41:51,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-07 21:41:51,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-07 21:41:51,677 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-07 21:41:51,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 09:41:51" (1/2) ... [2019-01-07 21:41:51,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4cd960 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 09:41:51, skipping insertion in model container [2019-01-07 21:41:51,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 09:41:51" (2/2) ... [2019-01-07 21:41:51,680 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-07 21:41:51,691 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-07 21:41:51,699 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-07 21:41:51,717 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-07 21:41:51,754 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-07 21:41:51,755 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-07 21:41:51,755 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-07 21:41:51,755 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-07 21:41:51,755 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-07 21:41:51,755 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-07 21:41:51,756 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-07 21:41:51,756 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-07 21:41:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-07 21:41:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-07 21:41:51,793 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:41:51,794 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-07 21:41:51,798 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:41:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:41:51,804 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-07 21:41:51,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:41:51,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:41:51,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:41:51,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:41:51,853 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:41:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:41:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:41:52,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 21:41:52,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-07 21:41:52,026 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:41:52,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-07 21:41:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-07 21:41:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 21:41:52,050 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-07 21:41:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:41:52,297 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-07 21:41:52,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 21:41:52,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-07 21:41:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:41:52,314 INFO L225 Difference]: With dead ends: 37 [2019-01-07 21:41:52,314 INFO L226 Difference]: Without dead ends: 32 [2019-01-07 21:41:52,317 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 [2019-01-07 21:41:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-07 21:41:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-07 21:41:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-07 21:41:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-07 21:41:52,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-07 21:41:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:41:52,356 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-07 21:41:52,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-07 21:41:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-07 21:41:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:41:52,357 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:41:52,357 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:41:52,358 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:41:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:41:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-07 21:41:52,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:41:52,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:41:52,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:41:52,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:41:52,360 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:41:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:41:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:41:52,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:41:52,525 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:41:52,526 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 21:41:52,528 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-07 21:41:52,569 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:41:52,569 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:41:52,647 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:41:52,648 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:41:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:41:52,655 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:41:52,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:41:52,655 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 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 [2019-01-07 21:41:52,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:41:52,672 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:41:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:41:52,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:41:53,050 WARN L181 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 21:41:53,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:41:53,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:41:53,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:41:53,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:41:53,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:41:53,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,490 INFO L303 Elim1Store]: Index analysis took 134 ms [2019-01-07 21:41:53,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:41:53,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,653 INFO L303 Elim1Store]: Index analysis took 154 ms [2019-01-07 21:41:53,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:41:53,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:53,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:41:53,748 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,063 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,490 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,538 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,582 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,612 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,666 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,691 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:54,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:54,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:41:54,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:54,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:54,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:41:54,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:54,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:54,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:54,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:54,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:41:55,129 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-07 21:41:55,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:41:55,357 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-07 21:41:55,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,466 INFO L303 Elim1Store]: Index analysis took 104 ms [2019-01-07 21:41:55,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:41:55,613 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 21:41:55,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:41:55,846 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:41:55,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:55,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:41:55,923 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:41:55,992 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:56,200 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:56,268 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:56,339 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:56,425 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:56,567 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:41:56,718 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:41:56,718 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-07 21:41:56,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:41:56,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:41:56,802 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:41:57,003 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:41:57,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-07 21:41:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:41:57,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:41:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:41:57,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:41:57,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:41:57,282 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:41:57,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:41:57,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:41:57,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:41:57,283 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-07 21:42:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:08,496 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-07 21:42:08,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:42:08,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 21:42:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:08,499 INFO L225 Difference]: With dead ends: 63 [2019-01-07 21:42:08,500 INFO L226 Difference]: Without dead ends: 60 [2019-01-07 21:42:08,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:42:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-07 21:42:08,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-07 21:42:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-07 21:42:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-07 21:42:08,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-07 21:42:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:08,509 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-07 21:42:08,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:42:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-07 21:42:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:42:08,509 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:08,510 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:42:08,510 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-07 21:42:08,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:08,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:08,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:08,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:08,512 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:08,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:08,591 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:08,591 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 21:42:08,592 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-07 21:42:08,593 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:08,593 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:08,603 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:08,603 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:42:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:08,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:08,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:08,604 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 21:42:08,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:08,613 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:08,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:08,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:08,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:42:08,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:42:08,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:42:08,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:42:08,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:42:08,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:08,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:42:08,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:42:08,887 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,001 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,054 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,093 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,123 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,148 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,196 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,217 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:42:09,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:42:09,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,517 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 63 treesize of output 86 [2019-01-07 21:42:09,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:42:09,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:42:09,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:09,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:42:09,816 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,855 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,924 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:09,964 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:10,007 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:10,050 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:10,133 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:10,133 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 21:42:10,380 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2019-01-07 21:42:10,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:10,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-07 21:42:10,410 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:10,480 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:10,482 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 21:42:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:10,502 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:10,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:42:10,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:42:10,534 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:42:10,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:42:10,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:42:10,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:42:10,535 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-07 21:42:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:11,473 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-07 21:42:11,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:42:11,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 21:42:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:11,476 INFO L225 Difference]: With dead ends: 62 [2019-01-07 21:42:11,476 INFO L226 Difference]: Without dead ends: 60 [2019-01-07 21:42:11,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:42:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-07 21:42:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-07 21:42:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-07 21:42:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-07 21:42:11,484 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-07 21:42:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:11,485 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-07 21:42:11,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:42:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-07 21:42:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:42:11,485 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:11,485 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:42:11,485 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-07 21:42:11,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:11,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:11,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:11,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:11,487 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:11,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 21:42:11,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-07 21:42:11,566 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:42:11,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-07 21:42:11,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-07 21:42:11,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 21:42:11,567 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-07 21:42:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:11,648 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-07 21:42:11,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 21:42:11,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-07 21:42:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:11,649 INFO L225 Difference]: With dead ends: 31 [2019-01-07 21:42:11,649 INFO L226 Difference]: Without dead ends: 30 [2019-01-07 21:42:11,652 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 [2019-01-07 21:42:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-07 21:42:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-07 21:42:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-07 21:42:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-07 21:42:11,659 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-07 21:42:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:11,659 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-07 21:42:11,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-07 21:42:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-07 21:42:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:42:11,660 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:11,660 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:42:11,660 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-07 21:42:11,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:11,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:11,662 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:11,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:11,738 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:11,738 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 21:42:11,738 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-07 21:42:11,739 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:11,739 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:11,746 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:11,746 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:42:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:11,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:11,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:11,747 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 21:42:11,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:11,756 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:11,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:11,903 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-07 21:42:11,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:11,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:42:11,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:11,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:11,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:42:12,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:42:12,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:42:12,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:42:12,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:12,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:42:12,300 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,343 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,390 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,465 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,568 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,670 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:12,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:42:12,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:42:12,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:42:12,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:42:12,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:42:12,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:42:12,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:42:12,835 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,904 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,951 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:12,984 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:13,011 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:13,108 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:13,128 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:13,183 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:13,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:13,270 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-07 21:42:13,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:13,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:42:13,371 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:13,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:13,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 21:42:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:13,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:13,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 21:42:13,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-07 21:42:13,547 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:42:13,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 21:42:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 21:42:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-07 21:42:13,548 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-07 21:42:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:13,628 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-07 21:42:13,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-07 21:42:13,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-07 21:42:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:13,630 INFO L225 Difference]: With dead ends: 32 [2019-01-07 21:42:13,631 INFO L226 Difference]: Without dead ends: 31 [2019-01-07 21:42:13,631 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 [2019-01-07 21:42:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-07 21:42:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-07 21:42:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-07 21:42:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-07 21:42:13,640 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-07 21:42:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:13,640 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-07 21:42:13,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 21:42:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-07 21:42:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:42:13,641 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:13,641 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:42:13,642 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-07 21:42:13,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:13,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:13,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:13,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:13,644 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:13,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:13,823 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:13,823 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 21:42:13,823 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-07 21:42:13,826 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:13,826 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:13,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:13,834 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:42:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:13,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:13,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:13,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 21:42:13,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:13,848 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:13,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:13,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:13,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:42:13,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:13,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:13,933 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 32 treesize of output 46 [2019-01-07 21:42:13,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:13,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:13,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:13,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:42:14,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:42:14,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:42:14,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:42:14,228 INFO L303 Elim1Store]: Index analysis took 137 ms [2019-01-07 21:42:14,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:42:14,230 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,328 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,376 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,411 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,441 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,466 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,485 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,555 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:14,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:42:14,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:42:14,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:42:14,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:42:14,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:42:14,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:14,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:42:14,980 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:15,021 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:15,062 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:15,104 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:15,143 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:15,186 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:15,260 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:15,261 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 21:42:15,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:15,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:42:15,362 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:15,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:15,648 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 21:42:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:15,664 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:15,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:42:15,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:42:15,696 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:42:15,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:42:15,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:42:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:42:15,697 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-07 21:42:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:16,601 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-07 21:42:16,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:42:16,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 21:42:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:16,603 INFO L225 Difference]: With dead ends: 65 [2019-01-07 21:42:16,603 INFO L226 Difference]: Without dead ends: 64 [2019-01-07 21:42:16,603 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:42:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-07 21:42:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-07 21:42:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-07 21:42:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-07 21:42:16,613 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-07 21:42:16,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:16,613 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-07 21:42:16,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:42:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-07 21:42:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:42:16,614 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:16,614 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:42:16,614 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-07 21:42:16,615 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:16,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:16,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:16,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:16,616 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:16,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:16,780 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:16,780 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 21:42:16,781 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-07 21:42:16,782 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:16,782 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:16,788 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:16,788 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:42:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:16,789 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:16,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:16,789 INFO 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 [2019-01-07 21:42:16,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:16,806 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:16,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:16,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:16,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:42:16,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:16,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:16,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:42:16,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:16,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:16,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:16,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:42:17,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:42:17,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,185 INFO L303 Elim1Store]: Index analysis took 115 ms [2019-01-07 21:42:17,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:42:17,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,346 INFO L303 Elim1Store]: Index analysis took 156 ms [2019-01-07 21:42:17,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:42:17,475 INFO L303 Elim1Store]: Index analysis took 125 ms [2019-01-07 21:42:17,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:42:17,477 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,539 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,586 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,623 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,652 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,677 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,695 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,714 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:17,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:42:17,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:42:17,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:42:17,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:17,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:42:18,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:42:18,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:42:18,150 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:18,190 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:18,230 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:18,272 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:18,314 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:18,362 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:18,435 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:18,436 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 21:42:18,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:18,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:42:18,481 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:18,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:18,553 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 21:42:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:18,571 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:18,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:42:18,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:42:18,602 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:42:18,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:42:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:42:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:42:18,603 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-07 21:42:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:19,327 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-07 21:42:19,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:42:19,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 21:42:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:19,329 INFO L225 Difference]: With dead ends: 67 [2019-01-07 21:42:19,329 INFO L226 Difference]: Without dead ends: 65 [2019-01-07 21:42:19,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:42:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-07 21:42:19,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-07 21:42:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-07 21:42:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-07 21:42:19,340 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-07 21:42:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:19,340 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-07 21:42:19,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:42:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-07 21:42:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:42:19,341 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:19,341 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:42:19,341 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-07 21:42:19,342 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:19,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:19,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:19,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:19,343 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:19,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:19,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:19,505 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:42:19,505 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-07 21:42:19,506 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:19,506 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:19,514 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:19,515 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:42:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:19,515 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:19,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:19,515 INFO 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 [2019-01-07 21:42:19,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:19,526 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:19,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:19,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:19,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:42:19,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:42:19,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:42:19,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:42:19,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:42:19,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:42:19,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:19,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:42:19,693 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:19,871 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:19,962 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:20,000 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:20,031 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:20,058 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:20,081 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:20,101 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:20,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:42:20,272 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-07 21:42:20,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:42:20,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:42:20,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:42:20,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:42:20,696 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 21:42:20,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:42:20,864 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:42:20,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:20,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:42:20,891 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:20,956 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,024 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,092 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,163 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,225 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,288 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,387 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. [2019-01-07 21:42:21,388 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 21:42:21,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:42:21,430 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,526 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:21,527 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 21:42:21,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:21,636 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:42:21,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 21:42:21,638 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:21,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:21,738 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-07 21:42:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:21,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:21,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:42:21,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:42:21,898 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:42:21,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:42:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:42:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:42:21,899 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-07 21:42:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:26,228 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-07 21:42:26,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:42:26,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:42:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:26,230 INFO L225 Difference]: With dead ends: 82 [2019-01-07 21:42:26,230 INFO L226 Difference]: Without dead ends: 80 [2019-01-07 21:42:26,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:42:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-07 21:42:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-07 21:42:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-07 21:42:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-07 21:42:26,239 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-07 21:42:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:26,240 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-07 21:42:26,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:42:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-07 21:42:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:42:26,240 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:26,241 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:42:26,241 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-07 21:42:26,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:26,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:26,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:26,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:26,242 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:26,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:26,382 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:26,382 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:42:26,382 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-07 21:42:26,384 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:26,384 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:26,393 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:26,393 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:42:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:26,393 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:26,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:26,394 INFO 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 [2019-01-07 21:42:26,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:26,408 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:26,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:26,420 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 86 treesize of output 76 [2019-01-07 21:42:26,562 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-01-07 21:42:26,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 21:42:26,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-07 21:42:26,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-07 21:42:26,841 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-01-07 21:42:26,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 21:42:26,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:26,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 21:42:26,977 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,036 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,094 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,153 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,212 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,273 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:27,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 21:42:27,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 21:42:27,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 21:42:27,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 21:42:27,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 21:42:27,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 21:42:27,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 21:42:27,484 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,560 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,602 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,634 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,660 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,678 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,695 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,712 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:27,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:27,784 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 21:42:28,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:28,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-07 21:42:28,580 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-07 21:42:28,634 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-07 21:42:30,625 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-07 21:42:30,626 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:885 [2019-01-07 21:42:46,083 WARN L181 SmtUtils]: Spent 11.14 s on a formula simplification. DAG size of input: 485 DAG size of output: 103 [2019-01-07 21:42:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:46,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:46,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 21:42:46,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-07 21:42:46,115 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:42:46,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 21:42:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 21:42:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-07 21:42:46,116 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-07 21:42:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:46,178 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-07 21:42:46,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 21:42:46,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-07 21:42:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:46,180 INFO L225 Difference]: With dead ends: 40 [2019-01-07 21:42:46,180 INFO L226 Difference]: Without dead ends: 39 [2019-01-07 21:42:46,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-07 21:42:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-07 21:42:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-07 21:42:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-07 21:42:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-07 21:42:46,190 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-07 21:42:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:46,190 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-07 21:42:46,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 21:42:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-07 21:42:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:42:46,191 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:46,191 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:42:46,192 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:46,192 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-07 21:42:46,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:46,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:46,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:46,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:46,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:46,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:46,510 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:46,510 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:42:46,513 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-07 21:42:46,515 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:46,515 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:46,526 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:46,527 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:42:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:46,527 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:46,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:46,528 INFO 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 [2019-01-07 21:42:46,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:46,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:46,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:46,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:42:46,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:42:46,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:42:46,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:42:46,953 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-07 21:42:46,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:46,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:42:47,153 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 21:42:47,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:42:47,308 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:42:47,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:47,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:42:47,334 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:47,396 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:47,463 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:47,538 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:47,613 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:47,690 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:47,766 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:47,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:47,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:42:47,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:42:47,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:42:47,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:42:47,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:42:47,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:42:47,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:42:47,920 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,282 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,327 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,361 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,387 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,407 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,423 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,439 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,539 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. [2019-01-07 21:42:48,540 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 21:42:48,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:42:48,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,714 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:48,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 21:42:48,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:48,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-07 21:42:48,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:48,881 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:48,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-07 21:42:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:48,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:49,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:42:49,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:42:49,035 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:42:49,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:42:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:42:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:42:49,036 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-07 21:42:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:52,938 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-07 21:42:52,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:42:52,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:42:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:52,940 INFO L225 Difference]: With dead ends: 84 [2019-01-07 21:42:52,940 INFO L226 Difference]: Without dead ends: 82 [2019-01-07 21:42:52,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:42:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-07 21:42:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-07 21:42:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-07 21:42:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-07 21:42:52,951 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-07 21:42:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:52,951 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-07 21:42:52,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:42:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-07 21:42:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:42:52,952 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:52,952 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:42:52,953 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-07 21:42:52,953 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:52,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:52,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:52,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:52,954 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:53,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:53,078 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:53,078 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:42:53,078 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-07 21:42:53,080 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:53,080 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:53,084 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:53,084 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:42:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:53,085 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:53,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:53,085 INFO 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 [2019-01-07 21:42:53,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:53,094 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:53,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:53,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:42:53,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:42:53,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,270 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:42:53,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:42:53,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:42:53,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:42:53,693 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:42:53,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:53,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:42:53,712 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:53,814 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:53,877 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:53,941 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,005 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,070 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,136 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:42:54,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:42:54,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:42:54,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:42:54,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:42:54,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:42:54,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:42:54,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:42:54,265 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,439 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,484 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,517 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,543 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,563 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,582 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,599 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,699 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. [2019-01-07 21:42:54,699 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 21:42:54,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:42:54,778 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:54,874 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:54,874 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 21:42:54,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:54,912 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:42:54,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-07 21:42:54,915 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:42:55,018 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:42:55,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-07 21:42:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:55,043 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:42:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:55,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:42:55,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:42:55,087 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:42:55,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:42:55,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:42:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:42:55,088 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-07 21:42:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:42:58,828 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-07 21:42:58,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:42:58,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:42:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:42:58,830 INFO L225 Difference]: With dead ends: 81 [2019-01-07 21:42:58,830 INFO L226 Difference]: Without dead ends: 80 [2019-01-07 21:42:58,831 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 [2019-01-07 21:42:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-07 21:42:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-07 21:42:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-07 21:42:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-07 21:42:58,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-07 21:42:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:42:58,841 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-07 21:42:58,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:42:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-07 21:42:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:42:58,842 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:42:58,842 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:42:58,843 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:42:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:58,843 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-07 21:42:58,843 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:42:58,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:58,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:58,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:42:58,844 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:42:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:42:59,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:59,160 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:42:59,160 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:42:59,160 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-07 21:42:59,161 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:42:59,161 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:42:59,166 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:42:59,166 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:42:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:42:59,166 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:42:59,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:42:59,167 INFO 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 [2019-01-07 21:42:59,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:42:59,183 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:42:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:42:59,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:42:59,349 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 21:42:59,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:42:59,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:42:59,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:42:59,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:42:59,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:42:59,796 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 21:42:59,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:42:59,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:43:00,177 WARN L181 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:43:00,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:00,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:43:00,204 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,303 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,372 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,448 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,520 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,596 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,673 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:00,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:00,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:00,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:00,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:00,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:00,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:00,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:43:00,791 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,867 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,911 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,945 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,972 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:00,994 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:01,013 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:01,028 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:01,124 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. [2019-01-07 21:43:01,124 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 21:43:01,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:43:01,164 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:01,263 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:01,264 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 21:43:01,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:01,317 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:43:01,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-07 21:43:01,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:01,421 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:01,421 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-07 21:43:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:01,565 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:01,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:01,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:43:01,606 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:01,607 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-07 21:43:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:03,279 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-07 21:43:03,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:43:03,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:03,281 INFO L225 Difference]: With dead ends: 81 [2019-01-07 21:43:03,281 INFO L226 Difference]: Without dead ends: 79 [2019-01-07 21:43:03,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-07 21:43:03,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-07 21:43:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-07 21:43:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-07 21:43:03,293 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-07 21:43:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:03,294 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-07 21:43:03,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-07 21:43:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:03,295 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:03,295 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:03,295 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:03,295 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-07 21:43:03,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:03,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:03,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:03,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:03,296 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:03,496 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-01-07 21:43:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:03,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:03,589 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:03,589 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:03,589 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-07 21:43:03,594 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:03,595 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:03,601 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:03,601 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:03,601 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:03,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:03,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 21:43:03,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:03,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:03,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:03,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:03,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:03,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:03,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:03,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:03,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:03,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:03,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:03,896 INFO L303 Elim1Store]: Index analysis took 159 ms [2019-01-07 21:43:03,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:43:03,898 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:04,770 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:05,285 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:05,324 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:05,355 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:05,381 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:05,404 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:05,424 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:05,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:43:05,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:43:05,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:43:05,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:43:05,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:43:05,890 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 21:43:05,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:05,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:43:06,037 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:43:06,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:43:06,058 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,117 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,176 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,234 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,296 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,359 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,420 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,519 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. [2019-01-07 21:43:06,519 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 21:43:06,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:43:06,561 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:06,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:06,660 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 21:43:06,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:06,898 INFO L303 Elim1Store]: Index analysis took 141 ms [2019-01-07 21:43:06,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-07 21:43:06,899 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:07,001 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:07,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-07 21:43:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:07,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:07,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:07,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 21:43:07,146 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:07,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 21:43:07,147 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-07 21:43:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:10,483 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-07 21:43:10,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 21:43:10,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:10,485 INFO L225 Difference]: With dead ends: 99 [2019-01-07 21:43:10,485 INFO L226 Difference]: Without dead ends: 95 [2019-01-07 21:43:10,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 21:43:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-07 21:43:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-07 21:43:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-07 21:43:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-07 21:43:10,497 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-07 21:43:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:10,497 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-07 21:43:10,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-07 21:43:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:10,498 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:10,498 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:10,498 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-07 21:43:10,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:10,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:10,499 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:10,805 WARN L181 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-07 21:43:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:11,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:11,008 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:11,009 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:11,009 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-07 21:43:11,010 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:11,010 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:11,014 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:11,014 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:11,014 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:11,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:11,015 INFO 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 [2019-01-07 21:43:11,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:11,032 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:11,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:11,281 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-07 21:43:11,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:11,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:11,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:11,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:11,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:11,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:11,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:11,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:11,421 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,482 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,534 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,573 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,603 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,629 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,648 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,670 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:11,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:11,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,781 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 78 treesize of output 84 [2019-01-07 21:43:11,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:11,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:11,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:11,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:12,109 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-07 21:43:12,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:12,128 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,172 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,219 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,270 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,330 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,369 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,440 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. [2019-01-07 21:43:12,441 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:12,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-07 21:43:12,488 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,552 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. [2019-01-07 21:43:12,552 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:12,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:12,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-07 21:43:12,589 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:12,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:12,659 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-07 21:43:12,879 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-07 21:43:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:12,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:13,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:13,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:43:13,292 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:13,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:13,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:13,293 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-07 21:43:13,808 WARN L181 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-07 21:43:14,628 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-01-07 21:43:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:14,928 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-07 21:43:14,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:43:14,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:14,930 INFO L225 Difference]: With dead ends: 101 [2019-01-07 21:43:14,930 INFO L226 Difference]: Without dead ends: 99 [2019-01-07 21:43:14,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-07 21:43:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-07 21:43:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-07 21:43:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-07 21:43:14,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-07 21:43:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:14,945 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-07 21:43:14,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-07 21:43:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:14,946 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:14,946 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:14,947 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-07 21:43:14,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:14,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:14,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:14,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:14,948 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:15,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:15,065 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:15,066 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:15,066 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-07 21:43:15,067 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:15,068 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:15,072 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:15,073 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:15,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:15,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:15,073 INFO 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 [2019-01-07 21:43:15,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:15,083 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:15,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:15,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:15,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:15,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:15,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:15,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:15,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:15,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:15,500 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,543 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,585 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,629 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,671 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,714 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:15,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:15,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:15,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:15,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:15,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:15,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:15,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:15,877 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,933 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:15,974 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,008 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,036 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,055 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,073 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,089 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,159 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. [2019-01-07 21:43:16,159 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:16,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-07 21:43:16,213 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,280 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. [2019-01-07 21:43:16,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:16,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:16,312 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:43:16,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-07 21:43:16,314 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:16,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:16,384 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-07 21:43:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:16,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:16,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:16,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:43:16,456 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:16,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:16,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:16,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:16,456 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-07 21:43:17,364 WARN L181 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-01-07 21:43:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:17,876 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-07 21:43:17,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:43:17,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:17,878 INFO L225 Difference]: With dead ends: 99 [2019-01-07 21:43:17,879 INFO L226 Difference]: Without dead ends: 98 [2019-01-07 21:43:17,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-07 21:43:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-07 21:43:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-07 21:43:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-07 21:43:17,892 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-07 21:43:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:17,892 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-07 21:43:17,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-07 21:43:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:17,893 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:17,893 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:17,893 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-07 21:43:17,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:17,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:17,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:17,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:17,895 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:17,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:17,966 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:17,966 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:17,966 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-07 21:43:17,968 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:17,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:17,971 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:17,972 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:17,972 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:17,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:17,972 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 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 [2019-01-07 21:43:17,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:17,990 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:17,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:18,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:18,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:18,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,044 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 32 treesize of output 46 [2019-01-07 21:43:18,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:18,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:18,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:18,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:18,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:18,105 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,166 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,214 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,252 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,282 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,308 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,329 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,378 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:18,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,472 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 78 treesize of output 84 [2019-01-07 21:43:18,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:18,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:18,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:18,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:18,803 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:18,804 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,849 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,889 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,931 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:18,973 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:19,015 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:19,088 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. [2019-01-07 21:43:19,089 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:19,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-07 21:43:19,145 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:19,210 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. [2019-01-07 21:43:19,211 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:19,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:19,248 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:43:19,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-07 21:43:19,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:19,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:19,321 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-07 21:43:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:19,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:19,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:19,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:43:19,952 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:19,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:19,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:19,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:19,953 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-07 21:43:20,488 WARN L181 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-07 21:43:21,585 WARN L181 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-01-07 21:43:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:22,400 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-07 21:43:22,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:43:22,400 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:22,402 INFO L225 Difference]: With dead ends: 101 [2019-01-07 21:43:22,402 INFO L226 Difference]: Without dead ends: 99 [2019-01-07 21:43:22,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-07 21:43:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-07 21:43:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-07 21:43:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-07 21:43:22,418 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-07 21:43:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:22,418 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-07 21:43:22,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-07 21:43:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:22,419 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:22,419 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:22,419 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-07 21:43:22,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:22,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:22,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:22,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:22,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:22,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:22,510 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:22,510 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:22,511 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-07 21:43:22,512 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:22,512 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:22,516 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:22,516 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:22,517 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:22,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:22,517 INFO 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 [2019-01-07 21:43:22,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:22,526 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:22,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:22,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:22,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:22,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:22,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,803 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:22,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:22,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:23,109 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-07 21:43:23,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:23,126 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,169 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,212 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,255 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,299 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,343 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:23,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:23,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:23,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:23,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:23,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:23,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:23,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:23,445 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,513 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,554 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,588 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,613 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,633 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,652 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,668 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,746 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. [2019-01-07 21:43:23,746 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:23,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-07 21:43:23,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,876 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. [2019-01-07 21:43:23,877 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:23,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:23,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-07 21:43:23,912 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:23,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:23,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-07 21:43:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:24,010 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:24,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:24,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:43:24,053 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:24,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:24,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:24,054 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-07 21:43:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:24,733 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-07 21:43:24,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:43:24,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:24,735 INFO L225 Difference]: With dead ends: 106 [2019-01-07 21:43:24,735 INFO L226 Difference]: Without dead ends: 104 [2019-01-07 21:43:24,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-07 21:43:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-07 21:43:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-07 21:43:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-07 21:43:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-07 21:43:24,750 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-07 21:43:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:24,750 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-07 21:43:24,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-07 21:43:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:24,751 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:24,751 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:24,751 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-07 21:43:24,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:24,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:24,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:24,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:24,753 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:25,012 WARN L181 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-07 21:43:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:25,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:25,023 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:25,023 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:25,024 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-07 21:43:25,024 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:25,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:25,028 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:25,028 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:25,029 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:25,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:25,029 INFO 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 [2019-01-07 21:43:25,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:25,043 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:25,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:25,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:25,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:25,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:25,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:25,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:25,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:25,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:25,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:25,144 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,203 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,250 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,289 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,317 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,341 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,360 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,380 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:25,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:25,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:25,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:25,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:25,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:25,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:25,795 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,833 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,873 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,914 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,953 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:25,994 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:26,064 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. [2019-01-07 21:43:26,064 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:26,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-07 21:43:26,151 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:26,216 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:26,217 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:26,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:26,469 INFO L303 Elim1Store]: Index analysis took 230 ms [2019-01-07 21:43:26,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-07 21:43:26,471 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:27,209 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:27,209 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-07 21:43:27,404 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-07 21:43:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:27,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:27,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:27,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:43:27,808 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:27,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:27,809 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-07 21:43:28,324 WARN L181 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-07 21:43:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:28,969 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-07 21:43:28,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:43:28,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:28,972 INFO L225 Difference]: With dead ends: 107 [2019-01-07 21:43:28,972 INFO L226 Difference]: Without dead ends: 99 [2019-01-07 21:43:28,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-07 21:43:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-07 21:43:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-07 21:43:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-07 21:43:28,988 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-07 21:43:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:28,988 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-07 21:43:28,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-07 21:43:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:28,989 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:28,989 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:28,990 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:28,990 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-07 21:43:28,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:28,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:28,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:28,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:28,991 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:29,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:29,129 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:29,129 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:29,129 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-07 21:43:29,130 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:29,130 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:29,133 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:29,133 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:29,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:29,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:29,134 INFO 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 [2019-01-07 21:43:29,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:29,152 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:29,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:29,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:29,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:29,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:29,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:29,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:29,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:29,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:29,554 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:29,604 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:29,647 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:29,694 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:29,738 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:29,783 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:29,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:29,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:29,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:29,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:29,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:29,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:29,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:30,059 INFO L303 Elim1Store]: Index analysis took 148 ms [2019-01-07 21:43:30,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:30,060 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,313 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,355 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,387 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,415 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,437 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,456 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,474 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:30,548 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:30,548 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:30,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-07 21:43:30,593 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-07 21:43:30,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-07 21:43:30,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-07 21:43:30,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:30,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:31,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-07 21:43:31,017 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-07 21:43:31,033 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-07 21:43:32,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:32,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:32,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:32,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:32,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:32,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:32,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:32,094 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:43:32,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-07 21:43:32,096 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:32,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-07 21:43:32,554 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-07 21:43:33,459 WARN L181 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-07 21:43:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:33,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:33,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:33,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-07 21:43:33,486 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:33,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:33,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:43:33,487 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-07 21:43:34,354 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-01-07 21:43:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:37,826 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-07 21:43:37,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-07 21:43:37,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:37,829 INFO L225 Difference]: With dead ends: 155 [2019-01-07 21:43:37,830 INFO L226 Difference]: Without dead ends: 152 [2019-01-07 21:43:37,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-07 21:43:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-07 21:43:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-07 21:43:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-07 21:43:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-07 21:43:37,849 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-07 21:43:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:37,849 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-07 21:43:37,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-07 21:43:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:37,850 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:37,850 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:37,850 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-07 21:43:37,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:37,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:37,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:37,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:37,851 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:38,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:38,019 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:38,019 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:38,019 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-07 21:43:38,021 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:38,021 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:38,028 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:38,028 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:43:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:38,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:38,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:38,029 INFO 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 [2019-01-07 21:43:38,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:38,045 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:38,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:38,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:38,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:38,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:38,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:38,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:38,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:38,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:38,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:38,151 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,213 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,259 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,296 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,327 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,350 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,369 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,388 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:38,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:38,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:38,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:38,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:38,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:38,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:38,796 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,835 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,874 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,913 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,952 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:38,994 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:39,067 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:39,068 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:39,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:43:39,156 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:39,231 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:39,231 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:39,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:39,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:39,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:43:39,285 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:39,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:43:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:43:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:43:39,286 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-07 21:43:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:39,642 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-07 21:43:39,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:43:39,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 21:43:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:39,644 INFO L225 Difference]: With dead ends: 104 [2019-01-07 21:43:39,644 INFO L226 Difference]: Without dead ends: 103 [2019-01-07 21:43:39,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:43:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-07 21:43:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-07 21:43:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-07 21:43:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-07 21:43:39,660 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-07 21:43:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:39,660 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-07 21:43:39,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:43:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-07 21:43:39,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:39,661 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:39,661 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:39,661 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:39,662 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-07 21:43:39,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:39,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:39,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:39,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:39,663 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:39,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:39,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:39,691 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:39,691 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-07 21:43:39,693 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:39,693 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:39,696 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:39,696 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:43:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:39,696 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:39,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:39,697 INFO 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 [2019-01-07 21:43:39,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:39,709 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:39,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:39,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:39,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 21:43:39,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 21:43:39,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 21:43:39,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 21:43:39,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 21:43:39,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:39,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 21:43:39,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 21:43:39,798 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:39,854 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:39,900 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:39,935 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:39,962 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:39,984 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,001 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,020 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-07 21:43:40,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 21:43:40,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-07 21:43:40,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-07 21:43:40,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 21:43:40,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 21:43:40,381 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,420 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,459 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,497 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,539 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,581 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:40,652 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 21:43:40,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:40,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-07 21:43:40,689 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:40,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:40,753 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-07 21:43:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:40,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:40,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:40,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:43:40,804 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:40,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:43:40,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:43:40,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:43:40,804 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-07 21:43:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:41,165 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-07 21:43:41,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:43:41,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 21:43:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:41,167 INFO L225 Difference]: With dead ends: 108 [2019-01-07 21:43:41,167 INFO L226 Difference]: Without dead ends: 107 [2019-01-07 21:43:41,168 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 [2019-01-07 21:43:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-07 21:43:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-07 21:43:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-07 21:43:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-07 21:43:41,188 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-07 21:43:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:41,188 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-07 21:43:41,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:43:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-07 21:43:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:41,189 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:41,189 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:41,189 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-07 21:43:41,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:41,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:41,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:41,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:41,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:41,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:41,329 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:41,330 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:41,330 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-07 21:43:41,331 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:41,331 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:41,334 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:41,334 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:41,334 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:41,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:41,335 INFO 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 [2019-01-07 21:43:41,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:41,344 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:41,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:41,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:41,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:41,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:41,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:41,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:41,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:41,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:41,737 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:41,777 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:41,819 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:41,863 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:41,908 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:41,950 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:42,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:42,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:42,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:42,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:42,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:42,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:42,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:42,056 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,113 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,157 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,188 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,215 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,237 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,256 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,271 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,340 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. [2019-01-07 21:43:42,340 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:42,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:43:42,391 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,460 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. [2019-01-07 21:43:42,461 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:42,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:42,734 INFO L303 Elim1Store]: Index analysis took 243 ms [2019-01-07 21:43:42,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-07 21:43:42,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:42,937 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:42,937 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-07 21:43:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:42,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:43,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:43,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 21:43:43,016 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:43,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-07 21:43:43,017 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-07 21:43:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:44,686 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-07 21:43:44,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 21:43:44,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:44,689 INFO L225 Difference]: With dead ends: 154 [2019-01-07 21:43:44,689 INFO L226 Difference]: Without dead ends: 153 [2019-01-07 21:43:44,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-07 21:43:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-07 21:43:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-07 21:43:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-07 21:43:44,712 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-07 21:43:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:44,712 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-07 21:43:44,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-07 21:43:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:44,713 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:44,713 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:44,713 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-07 21:43:44,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:44,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:44,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:44,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:44,714 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:44,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:44,907 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:44,907 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:44,907 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-07 21:43:44,910 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:44,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:44,913 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:44,913 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:44,913 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:44,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:44,914 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 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 [2019-01-07 21:43:44,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:44,926 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:44,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:44,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:44,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:44,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,978 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 32 treesize of output 46 [2019-01-07 21:43:44,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,985 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 34 treesize of output 60 [2019-01-07 21:43:44,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:44,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:44,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,003 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:45,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:45,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:45,031 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,110 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,157 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,195 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,222 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,247 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,268 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,287 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:45,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:45,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:45,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:45,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:45,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:45,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:45,757 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,800 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,841 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,881 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,924 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:45,964 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:46,037 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. [2019-01-07 21:43:46,037 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:46,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:43:46,086 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:46,154 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. [2019-01-07 21:43:46,154 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:46,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:46,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-07 21:43:46,190 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:46,260 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:46,260 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-07 21:43:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:46,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:46,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:46,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 21:43:46,333 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:46,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 21:43:46,334 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-07 21:43:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:47,020 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-07 21:43:47,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 21:43:47,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:47,022 INFO L225 Difference]: With dead ends: 148 [2019-01-07 21:43:47,022 INFO L226 Difference]: Without dead ends: 146 [2019-01-07 21:43:47,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-07 21:43:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-07 21:43:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-07 21:43:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-07 21:43:47,042 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-07 21:43:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:47,043 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-07 21:43:47,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-07 21:43:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:47,044 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:47,044 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:47,044 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-07 21:43:47,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:47,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:47,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:47,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:47,046 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:47,241 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-01-07 21:43:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:47,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:47,264 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:47,264 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:47,264 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-07 21:43:47,265 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:47,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:47,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:47,267 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:47,268 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:47,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:47,268 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 21:43:47,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:47,277 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:47,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:47,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:47,322 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 30 treesize of output 36 [2019-01-07 21:43:47,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:47,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:47,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:47,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:47,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:47,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:47,386 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,446 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,492 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,529 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,560 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,585 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,604 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,624 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:47,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:47,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:47,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:47,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:47,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:47,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:48,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:48,039 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,080 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,121 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,163 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,206 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,249 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,322 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. [2019-01-07 21:43:48,323 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:48,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:43:48,377 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,445 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. [2019-01-07 21:43:48,446 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:48,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:48,481 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:43:48,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-07 21:43:48,483 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:48,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:48,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-07 21:43:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:48,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:48,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:48,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:43:48,617 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:48,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:43:48,617 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-07 21:43:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:49,121 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-07 21:43:49,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 21:43:49,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:49,124 INFO L225 Difference]: With dead ends: 145 [2019-01-07 21:43:49,124 INFO L226 Difference]: Without dead ends: 143 [2019-01-07 21:43:49,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-07 21:43:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-07 21:43:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-07 21:43:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-07 21:43:49,147 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-07 21:43:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:49,147 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-07 21:43:49,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-07 21:43:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:49,148 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:49,148 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:49,149 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-07 21:43:49,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:49,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:49,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:49,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:49,150 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:49,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:49,222 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:49,222 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:49,222 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-07 21:43:49,223 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:49,223 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:49,226 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:49,226 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:43:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:49,227 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:49,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:49,227 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 21:43:49,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:49,236 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:49,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:49,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:49,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 21:43:49,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 21:43:49,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 21:43:49,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 21:43:49,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 21:43:49,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 21:43:49,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 21:43:49,314 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,372 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,414 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,450 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,479 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,500 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,519 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,539 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-07 21:43:49,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 21:43:49,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,650 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 63 treesize of output 82 [2019-01-07 21:43:49,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,713 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-07 21:43:49,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 21:43:49,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:49,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 21:43:49,897 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,934 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:49,972 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:50,012 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:50,052 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:50,095 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:50,165 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:50,166 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 21:43:50,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:50,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-07 21:43:50,206 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:50,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:50,272 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-07 21:43:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:50,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:50,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:50,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:43:50,353 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:50,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:43:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:43:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:43:50,354 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-07 21:43:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:50,827 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-07 21:43:50,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:43:50,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 21:43:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:50,830 INFO L225 Difference]: With dead ends: 124 [2019-01-07 21:43:50,830 INFO L226 Difference]: Without dead ends: 123 [2019-01-07 21:43:50,830 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 [2019-01-07 21:43:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-07 21:43:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-07 21:43:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-07 21:43:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-07 21:43:50,850 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-07 21:43:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:50,850 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-07 21:43:50,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:43:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-07 21:43:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:50,851 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:50,851 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:50,851 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:50,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-07 21:43:50,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:50,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:50,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:50,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:50,853 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:51,013 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-07 21:43:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:51,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:51,045 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:51,045 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:51,045 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-07 21:43:51,047 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:51,047 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:51,050 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:51,050 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:43:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:51,051 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:51,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:51,051 INFO 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 [2019-01-07 21:43:51,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:51,062 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:51,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:51,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:51,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:51,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:51,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:51,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:51,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:51,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:51,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:43:51,242 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,303 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,349 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,388 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,417 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,442 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,464 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,482 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:43:51,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:43:51,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:43:51,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,710 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:43:51,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:43:51,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:51,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:43:51,901 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,941 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:51,985 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:52,031 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:52,078 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:52,125 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:52,218 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. [2019-01-07 21:43:52,219 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:43:52,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-07 21:43:52,317 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:52,386 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. [2019-01-07 21:43:52,387 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 21:43:52,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:52,553 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-07 21:43:52,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-07 21:43:52,554 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:52,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:52,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-07 21:43:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:52,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:53,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:53,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 21:43:53,016 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:53,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:43:53,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:43:53,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 21:43:53,017 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-07 21:43:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:53,903 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-07 21:43:53,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 21:43:53,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:43:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:53,906 INFO L225 Difference]: With dead ends: 176 [2019-01-07 21:43:53,906 INFO L226 Difference]: Without dead ends: 174 [2019-01-07 21:43:53,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-07 21:43:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-07 21:43:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-07 21:43:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-07 21:43:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-07 21:43:53,934 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-07 21:43:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:53,935 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-07 21:43:53,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:43:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-07 21:43:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:43:53,936 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:53,936 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:43:53,936 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-07 21:43:53,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:53,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:53,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:53,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:53,937 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:54,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:54,032 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:54,032 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:43:54,032 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-07 21:43:54,033 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:54,033 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:54,037 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:54,037 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:43:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:54,037 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:54,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:54,038 INFO 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 [2019-01-07 21:43:54,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:54,048 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:54,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:54,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-07 21:43:54,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 21:43:54,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-07 21:43:54,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,188 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 51 treesize of output 87 [2019-01-07 21:43:54,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 21:43:54,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 21:43:54,369 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,409 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,450 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,491 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,533 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,577 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:54,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 21:43:54,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 21:43:54,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 21:43:54,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 21:43:54,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 21:43:54,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 21:43:54,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 21:43:54,674 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,727 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,768 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,800 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,824 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,844 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,861 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,878 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:54,947 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:54,948 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 21:43:54,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:54,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-07 21:43:54,985 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:55,053 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:55,054 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-07 21:43:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:55,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:55,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:55,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:43:55,133 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:55,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:43:55,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:43:55,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:43:55,134 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-07 21:43:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:55,426 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-07 21:43:55,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:43:55,426 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 21:43:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:55,429 INFO L225 Difference]: With dead ends: 135 [2019-01-07 21:43:55,429 INFO L226 Difference]: Without dead ends: 134 [2019-01-07 21:43:55,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:43:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-07 21:43:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-07 21:43:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-07 21:43:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-07 21:43:55,457 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-07 21:43:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:55,457 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-07 21:43:55,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:43:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-07 21:43:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 21:43:55,458 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:55,458 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 21:43:55,458 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-07 21:43:55,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:55,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:55,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:55,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:55,460 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:55,626 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-07 21:43:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:55,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:55,725 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:55,725 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 21:43:55,725 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-07 21:43:55,726 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:55,726 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:55,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:55,729 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 21:43:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:55,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:55,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:55,729 INFO 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 [2019-01-07 21:43:55,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:55,737 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:55,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:55,869 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 21:43:55,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:43:55,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:43:55,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:43:55,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:43:55,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:43:55,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:43:55,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:43:55,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:55,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:43:55,934 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,017 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,066 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,104 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,133 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,158 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,179 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,200 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:43:56,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,310 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 101 treesize of output 104 [2019-01-07 21:43:56,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:43:56,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:43:56,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:43:56,641 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 21:43:56,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:43:56,786 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:43:56,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:56,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:43:56,805 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,864 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,923 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:56,984 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:57,046 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:57,106 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:57,169 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:43:57,267 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. [2019-01-07 21:43:57,267 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-07 21:43:57,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:43:57,304 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:57,410 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. [2019-01-07 21:43:57,410 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-07 21:43:57,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,455 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:43:57,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 21:43:57,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:57,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:57,555 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-07 21:43:57,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:57,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-07 21:43:57,617 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:43:57,712 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:43:57,713 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-07 21:43:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:57,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:43:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:57,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:43:57,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-07 21:43:57,799 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:43:57,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 21:43:57,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 21:43:57,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-07 21:43:57,800 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-07 21:43:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:43:58,917 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-07 21:43:58,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-07 21:43:58,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-07 21:43:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:43:58,921 INFO L225 Difference]: With dead ends: 212 [2019-01-07 21:43:58,921 INFO L226 Difference]: Without dead ends: 205 [2019-01-07 21:43:58,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-07 21:43:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-07 21:43:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-07 21:43:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-07 21:43:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-07 21:43:58,957 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-07 21:43:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:43:58,958 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-07 21:43:58,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-07 21:43:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-07 21:43:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 21:43:58,959 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:43:58,959 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 21:43:58,959 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:43:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:58,960 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-07 21:43:58,960 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:43:58,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:58,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:58,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:43:58,961 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:43:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:59,326 WARN L181 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-07 21:43:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:43:59,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:59,361 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:43:59,361 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 21:43:59,362 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-07 21:43:59,362 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:43:59,362 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:43:59,365 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:43:59,366 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 21:43:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:43:59,366 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:43:59,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:43:59,366 INFO 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 [2019-01-07 21:43:59,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:43:59,375 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:43:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:43:59,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:43:59,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:43:59,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:43:59,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:43:59,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:43:59,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:43:59,839 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 21:43:59,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:43:59,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:43:59,995 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:44:00,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:44:00,018 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,096 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,161 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,228 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,308 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,390 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,463 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:44:00,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:44:00,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:44:00,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:44:00,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:44:00,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:44:00,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:44:00,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:44:00,573 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,645 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,689 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,722 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,749 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,769 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,787 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,804 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:00,902 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. [2019-01-07 21:44:00,903 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-07 21:44:00,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:00,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:44:00,941 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:01,037 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-07 21:44:01,037 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-07 21:44:01,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,085 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:44:01,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 21:44:01,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:01,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:44:01,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-07 21:44:01,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:01,239 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:44:01,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-07 21:44:01,241 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:01,335 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:44:01,336 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-07 21:44:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:01,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:44:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:01,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:44:01,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-07 21:44:01,451 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:44:01,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 21:44:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 21:44:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-07 21:44:01,452 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-07 21:44:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:44:04,988 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-07 21:44:04,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 21:44:04,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-07 21:44:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:44:04,990 INFO L225 Difference]: With dead ends: 169 [2019-01-07 21:44:04,991 INFO L226 Difference]: Without dead ends: 168 [2019-01-07 21:44:04,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-07 21:44:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-07 21:44:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-07 21:44:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-07 21:44:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-07 21:44:05,028 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-07 21:44:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:44:05,028 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-07 21:44:05,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-07 21:44:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-07 21:44:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 21:44:05,029 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:44:05,029 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 21:44:05,029 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:44:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:44:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-07 21:44:05,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:44:05,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:44:05,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:44:05,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:44:05,031 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:44:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:44:05,434 WARN L181 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-01-07 21:44:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:05,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:44:05,474 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:44:05,474 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 21:44:05,475 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-07 21:44:05,476 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:44:05,476 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:44:05,479 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:44:05,479 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 21:44:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:44:05,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:44:05,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:44:05,480 INFO 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 [2019-01-07 21:44:05,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:44:05,496 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:44:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:44:05,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:44:05,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 21:44:05,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 21:44:05,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 21:44:05,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 21:44:05,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 21:44:05,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:05,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 21:44:06,068 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 21:44:06,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 21:44:06,086 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,147 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,209 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,270 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,335 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,396 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,458 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:44:06,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:44:06,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:44:06,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:44:06,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:44:06,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:44:06,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:44:06,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 21:44:06,559 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,636 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,678 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,708 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,736 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,758 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,775 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,791 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:06,885 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. [2019-01-07 21:44:06,885 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-07 21:44:06,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:06,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 21:44:06,927 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:07,025 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. [2019-01-07 21:44:07,026 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-07 21:44:07,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,072 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:44:07,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 21:44:07,074 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:07,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 21:44:07,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-07 21:44:07,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:07,238 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:44:07,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-07 21:44:07,240 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:07,337 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 21:44:07,338 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-07 21:44:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:09,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:44:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:09,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:44:09,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-07 21:44:09,455 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:44:09,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 21:44:09,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 21:44:09,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2019-01-07 21:44:09,456 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-07 21:44:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:44:10,972 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-07 21:44:10,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 21:44:10,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-07 21:44:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:44:10,975 INFO L225 Difference]: With dead ends: 176 [2019-01-07 21:44:10,975 INFO L226 Difference]: Without dead ends: 172 [2019-01-07 21:44:10,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=85, Invalid=154, Unknown=1, NotChecked=0, Total=240 [2019-01-07 21:44:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-07 21:44:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-07 21:44:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-07 21:44:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-07 21:44:11,005 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-07 21:44:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:44:11,005 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-07 21:44:11,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-07 21:44:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-07 21:44:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 21:44:11,006 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:44:11,006 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 21:44:11,007 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:44:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:44:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-07 21:44:11,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:44:11,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:44:11,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:44:11,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:44:11,008 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:44:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:44:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:11,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:44:11,206 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:44:11,206 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 21:44:11,206 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-07 21:44:11,207 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:44:11,207 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:44:11,209 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:44:11,209 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 21:44:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:44:11,210 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:44:11,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:44:11,210 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 21:44:11,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:44:11,219 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:44:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:44:11,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:44:11,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 21:44:11,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 21:44:11,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 21:44:11,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,422 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 21:44:11,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 21:44:11,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:11,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-07 21:44:11,612 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:11,653 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:11,696 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:11,738 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:11,783 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:11,825 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:11,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 21:44:11,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 21:44:11,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 21:44:11,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 21:44:11,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 21:44:11,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 21:44:11,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 21:44:11,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 21:44:11,952 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,019 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,062 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,096 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,123 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,144 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,163 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,180 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:44:12,253 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. [2019-01-07 21:44:12,254 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 21:44:12,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:12,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-07 21:44:12,368 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-07 21:44:12,401 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-07 21:44:14,047 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-07 21:44:14,048 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:838 [2019-01-07 21:44:14,551 WARN L181 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 169 [2019-01-07 21:44:14,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,563 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:44:14,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 134 [2019-01-07 21:44:14,564 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:14,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:14,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-07 21:44:14,810 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:15,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 162 [2019-01-07 21:44:15,074 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:15,291 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-07 21:44:15,292 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:341, output treesize:277 [2019-01-07 21:44:15,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 124 [2019-01-07 21:44:15,439 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:15,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-07 21:44:15,638 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:15,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:44:15,850 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 21:44:15,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 173 [2019-01-07 21:44:15,852 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 21:44:16,040 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-07 21:44:16,040 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-07 21:44:16,349 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-07 21:44:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:16,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:44:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:44:16,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:44:16,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-07 21:44:16,395 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:44:16,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 21:44:16,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 21:44:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-07 21:44:16,395 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-07 21:44:18,793 WARN L181 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 69 [2019-01-07 21:44:23,725 WARN L181 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-01-07 21:44:30,418 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-07 21:44:30,420 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-07 21:44:30,423 INFO L168 Benchmark]: Toolchain (without parser) took 159384.02 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -240.2 MB). Peak memory consumption was 913.7 MB. Max. memory is 7.1 GB. [2019-01-07 21:44:30,424 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 21:44:30,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 21:44:30,424 INFO L168 Benchmark]: Boogie Preprocessor took 43.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 21:44:30,425 INFO L168 Benchmark]: RCFGBuilder took 502.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-07 21:44:30,425 INFO L168 Benchmark]: TraceAbstraction took 158749.47 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -261.4 MB). Peak memory consumption was 892.6 MB. Max. memory is 7.1 GB. [2019-01-07 21:44:30,427 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 83.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 502.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 158749.47 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -261.4 MB). Peak memory consumption was 892.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...