java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 14:38:51,868 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:38:51,872 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:38:51,888 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-08 14:38:51,889 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-08 14:38:51,890 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-08 14:38:51,892 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-08 14:38:51,894 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-08 14:38:51,898 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-08 14:38:51,899 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-08 14:38:51,900 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-08 14:38:51,900 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-08 14:38:51,901 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-08 14:38:51,913 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-08 14:38:51,914 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-08 14:38:51,915 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-08 14:38:51,916 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-08 14:38:51,917 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-08 14:38:51,921 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-08 14:38:51,923 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-08 14:38:51,924 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-08 14:38:51,925 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-08 14:38:51,928 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-08 14:38:51,928 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-08 14:38:51,928 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-08 14:38:51,929 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-08 14:38:51,930 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-08 14:38:51,931 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-08 14:38:51,931 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-08 14:38:51,932 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-08 14:38:51,933 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-08 14:38:51,936 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-08 14:38:51,937 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-08 14:38:51,937 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-08 14:38:51,938 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-08 14:38:51,939 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-08 14:38:51,939 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-08 14:38:51,964 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:38:51,965 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:38:51,966 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:38:51,966 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:38:51,966 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:38:51,966 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:38:51,966 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:38:51,967 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:38:51,967 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:38:51,968 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-08 14:38:51,968 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-08 14:38:51,968 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:38:51,968 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:38:51,969 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:38:51,969 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:38:51,969 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:38:51,971 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:38:51,971 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:38:51,971 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:38:51,971 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:38:51,972 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:38:51,972 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:38:51,972 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:38:51,972 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:38:51,973 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:38:51,974 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:38:51,974 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:38:51,975 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:38:51,975 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:38:51,975 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:38:51,975 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:38:51,976 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:38:51,976 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:38:51,976 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:38:51,976 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:38:51,976 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:38:51,977 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:38:51,977 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:38:51,977 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:38:52,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:38:52,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:38:52,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:38:52,045 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:38:52,046 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:38:52,046 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-08 14:38:52,047 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-08 14:38:52,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:38:52,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:38:52,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:38:52,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:38:52,099 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:38:52,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:38:52,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:38:52,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:38:52,169 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:38:52,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... [2019-01-08 14:38:52,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:38:52,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:38:52,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:38:52,221 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:38:52,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:38:52,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 14:38:52,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 14:38:52,747 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 14:38:52,748 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-08 14:38:52,749 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:38:52 BoogieIcfgContainer [2019-01-08 14:38:52,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:38:52,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:38:52,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:38:52,754 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:38:52,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:38:52" (1/2) ... [2019-01-08 14:38:52,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2050982f and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:38:52, skipping insertion in model container [2019-01-08 14:38:52,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:38:52" (2/2) ... [2019-01-08 14:38:52,757 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-08 14:38:52,767 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:38:52,776 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-08 14:38:52,794 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-08 14:38:52,825 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:38:52,826 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:38:52,826 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:38:52,826 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:38:52,826 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:38:52,826 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:38:52,827 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:38:52,827 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:38:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-08 14:38:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 14:38:52,848 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:52,849 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 14:38:52,853 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:52,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-08 14:38:52,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:52,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:52,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:52,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:52,908 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:53,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:38:53,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:38:53,110 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:38:53,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:38:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:38:53,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:38:53,139 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-08 14:38:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:53,456 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-08 14:38:53,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:38:53,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 14:38:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:53,473 INFO L225 Difference]: With dead ends: 41 [2019-01-08 14:38:53,473 INFO L226 Difference]: Without dead ends: 36 [2019-01-08 14:38:53,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:38:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-08 14:38:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-08 14:38:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-08 14:38:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-08 14:38:53,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-08 14:38:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:53,518 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-08 14:38:53,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:38:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-08 14:38:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:38:53,519 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:53,519 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:38:53,519 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-08 14:38:53,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:53,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:53,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:53,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:53,522 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:53,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:53,796 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:53,797 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:38:53,802 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-08 14:38:53,886 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:53,886 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:55,048 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:55,050 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:38:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:55,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:55,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:55,060 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:55,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:55,074 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:55,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:55,395 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-08 14:38:55,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 33 [2019-01-08 14:38:55,452 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 33 treesize of output 39 [2019-01-08 14:38:55,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,522 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 35 treesize of output 49 [2019-01-08 14:38:55,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:38:55,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,699 INFO L303 Elim1Store]: Index analysis took 108 ms [2019-01-08 14:38:55,701 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 39 treesize of output 81 [2019-01-08 14:38:55,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,838 INFO L303 Elim1Store]: Index analysis took 130 ms [2019-01-08 14:38:55,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:38:55,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:38:55,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,996 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:38:56,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:38:56,066 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,628 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,996 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,066 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,123 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,164 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,223 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,250 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,296 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:38:57,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,491 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 [2019-01-08 14:38:57,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:38:57,696 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-08 14:38:57,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:38:57,843 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-08 14:38:57,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:57,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-08 14:38:58,009 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-08 14:38:58,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,040 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 [2019-01-08 14:38:58,200 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:38:58,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,225 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 [2019-01-08 14:38:58,227 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,321 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,388 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,454 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,576 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,656 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,729 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,843 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. [2019-01-08 14:38:58,844 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:38:59,030 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-08 14:38:59,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:59,075 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 153 [2019-01-08 14:38:59,076 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:59,212 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. [2019-01-08 14:38:59,212 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-08 14:38:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:59,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:59,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:59,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:38:59,294 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:59,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:38:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:38:59,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:38:59,297 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-08 14:38:59,446 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-01-08 14:39:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:11,567 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-08 14:39:11,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:39:11,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:39:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:11,571 INFO L225 Difference]: With dead ends: 71 [2019-01-08 14:39:11,571 INFO L226 Difference]: Without dead ends: 69 [2019-01-08 14:39:11,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:39:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-08 14:39:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-08 14:39:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-08 14:39:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-08 14:39:11,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-08 14:39:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:11,580 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-08 14:39:11,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:39:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-08 14:39:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:39:11,581 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:11,581 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:39:11,582 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-08 14:39:11,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:11,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:11,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:11,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:11,584 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:11,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:11,732 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:11,732 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:39:11,732 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-08 14:39:11,735 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:11,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:12,229 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:12,229 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:39:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:12,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:12,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:12,230 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:12,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:12,246 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:12,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:12,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,353 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 [2019-01-08 14:39:12,474 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-08 14:39:12,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,486 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 101 treesize of output 104 [2019-01-08 14:39:12,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2019-01-08 14:39:12,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-08 14:39:12,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-08 14:39:12,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,873 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 [2019-01-08 14:39:13,004 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:39:13,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:13,048 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 [2019-01-08 14:39:13,050 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,107 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,169 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,230 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,294 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,383 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,448 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,531 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 30 treesize of output 33 [2019-01-08 14:39:13,558 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 33 treesize of output 39 [2019-01-08 14:39:13,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:39:13,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:39:13,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:39:13,588 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 41 treesize of output 103 [2019-01-08 14:39:13,596 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 43 treesize of output 129 [2019-01-08 14:39:13,602 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:39:13,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:39:13,632 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,714 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,775 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,823 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,860 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,891 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,915 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,936 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:13,955 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,059 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. [2019-01-08 14:39:14,059 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:39:14,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,156 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 [2019-01-08 14:39:14,157 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,570 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. [2019-01-08 14:39:14,570 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-08 14:39:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:14,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:14,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:14,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:39:14,647 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:14,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:39:14,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:39:14,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:39:14,648 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-08 14:39:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:25,969 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-08 14:39:25,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:39:25,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:39:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:25,972 INFO L225 Difference]: With dead ends: 54 [2019-01-08 14:39:25,972 INFO L226 Difference]: Without dead ends: 52 [2019-01-08 14:39:25,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:39:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-08 14:39:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-08 14:39:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-08 14:39:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-08 14:39:25,980 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-08 14:39:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:25,980 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-08 14:39:25,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:39:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-08 14:39:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:39:25,980 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:25,981 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:39:25,981 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:25,981 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-08 14:39:25,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:25,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:25,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:25,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:25,983 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:26,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:26,115 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:26,115 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:39:26,115 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-08 14:39:26,117 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:26,118 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:28,979 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:28,979 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:39:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:28,981 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:28,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:28,981 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:28,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:28,993 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:29,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:29,094 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 30 treesize of output 33 [2019-01-08 14:39:29,098 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 33 treesize of output 39 [2019-01-08 14:39:29,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:39:29,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,116 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 37 treesize of output 63 [2019-01-08 14:39:29,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:39:29,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,151 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 41 treesize of output 103 [2019-01-08 14:39:29,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:39:29,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,215 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:39:29,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:39:29,233 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,319 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,386 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,438 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,479 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,509 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,534 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,557 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,577 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:39:29,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:39:29,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2019-01-08 14:39:29,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:39:29,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,953 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 [2019-01-08 14:39:30,097 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-08 14:39:30,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,116 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 [2019-01-08 14:39:30,286 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:39:30,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:30,309 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 [2019-01-08 14:39:30,311 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:30,367 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:30,424 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:30,486 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:30,546 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:30,608 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:30,670 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:30,799 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. [2019-01-08 14:39:30,800 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:39:32,641 WARN L181 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-08 14:39:32,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 16 case distinctions, treesize of input 56 treesize of output 190 [2019-01-08 14:39:32,791 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-08 14:39:32,936 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-08 14:39:37,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-08 14:39:37,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1303