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 0.1.24-0ed9222-m [2019-01-11 14:57:28,741 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 14:57:28,743 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 14:57:28,754 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 14:57:28,754 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 14:57:28,755 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 14:57:28,757 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 14:57:28,758 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 14:57:28,760 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 14:57:28,761 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 14:57:28,762 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-11 14:57:28,762 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-11 14:57:28,763 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-11 14:57:28,764 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-11 14:57:28,765 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-11 14:57:28,766 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-11 14:57:28,767 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-11 14:57:28,770 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-11 14:57:28,774 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-11 14:57:28,776 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-11 14:57:28,777 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-11 14:57:28,780 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-11 14:57:28,782 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-01-11 14:57:28,791 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 [2019-01-11 14:57:28,814 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 14:57:28,814 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 14:57:28,815 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 14:57:28,815 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 14:57:28,815 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 14:57:28,815 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 14:57:28,816 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 14:57:28,816 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 14:57:28,816 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 14:57:28,816 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-11 14:57:28,816 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-11 14:57:28,817 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 14:57:28,817 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 14:57:28,818 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 14:57:28,818 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 14:57:28,819 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 14:57:28,819 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 14:57:28,819 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 14:57:28,819 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 14:57:28,819 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 14:57:28,820 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 14:57:28,820 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 14:57:28,820 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 14:57:28,821 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 14:57:28,821 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 14:57:28,821 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 14:57:28,821 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 14:57:28,822 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 14:57:28,822 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 14:57:28,822 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 14:57:28,822 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 14:57:28,823 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 14:57:28,823 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 14:57:28,823 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 14:57:28,823 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 14:57:28,823 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 14:57:28,824 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 14:57:28,824 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 14:57:28,824 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 14:57:28,857 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 14:57:28,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 14:57:28,878 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 14:57:28,879 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 14:57:28,880 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 14:57:28,881 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-11 14:57:28,881 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-11 14:57:28,936 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 14:57:28,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 14:57:28,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 14:57:28,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 14:57:28,939 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 14:57:28,956 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:28,971 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 14:57:29,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 14:57:29,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 14:57:29,003 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 14:57:29,015 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,015 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,018 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,018 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,022 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,026 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,027 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 11.01 02:57:28" (1/1) ... [2019-01-11 14:57:29,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 14:57:29,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 14:57:29,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 14:57:29,030 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 14:57:29,031 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 11.01 02:57:28" (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 [2019-01-11 14:57:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 14:57:29,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 14:57:29,550 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 14:57:29,551 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-11 14:57:29,552 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:57:29 BoogieIcfgContainer [2019-01-11 14:57:29,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 14:57:29,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 14:57:29,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 14:57:29,556 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 14:57:29,557 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 11.01 02:57:28" (1/2) ... [2019-01-11 14:57:29,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568ebf19 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:57:29, skipping insertion in model container [2019-01-11 14:57:29,558 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 11.01 02:57:29" (2/2) ... [2019-01-11 14:57:29,560 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-11 14:57:29,569 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 14:57:29,578 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-11 14:57:29,595 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-11 14:57:29,627 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 14:57:29,627 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 14:57:29,627 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 14:57:29,628 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 14:57:29,628 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 14:57:29,628 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 14:57:29,628 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 14:57:29,628 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 14:57:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-11 14:57:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 14:57:29,651 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:57:29,652 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 14:57:29,654 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:57:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:57:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-11 14:57:29,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:57:29,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:57:29,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:57:29,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:57:29,719 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:57:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:57:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:57:29,911 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:57:29,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:57:29,911 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:57:29,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:57:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:57:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:57:29,928 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-11 14:57:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:57:30,205 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-11 14:57:30,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:57:30,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 14:57:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:57:30,221 INFO L225 Difference]: With dead ends: 41 [2019-01-11 14:57:30,221 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 14:57:30,224 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 [2019-01-11 14:57:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 14:57:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-11 14:57:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-11 14:57:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-11 14:57:30,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-11 14:57:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:57:30,295 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-11 14:57:30,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:57:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-11 14:57:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:57:30,297 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:57:30,297 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:57:30,298 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:57:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:57:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-11 14:57:30,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:57:30,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:57:30,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:57:30,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:57:30,300 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:57:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:57:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:57:30,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:57:30,434 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:57:30,435 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:57:30,439 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-11 14:57:30,503 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 14:57:30,504 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:57:31,686 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:57:31,688 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. [2019-01-11 14:57:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:57:31,698 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:57:31,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:57:31,698 INFO 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 [2019-01-11 14:57:31,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:57:31,716 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:57:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:57:31,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:57:32,079 WARN L181 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-11 14:57:32,128 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 [2019-01-11 14:57:32,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:57:32,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,225 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 [2019-01-11 14:57:32,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,328 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 [2019-01-11 14:57:32,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,457 INFO L303 Elim1Store]: Index analysis took 122 ms [2019-01-11 14:57:32,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:57:32,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,624 INFO L303 Elim1Store]: Index analysis took 157 ms [2019-01-11 14:57:32,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:57:32,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,803 INFO L303 Elim1Store]: Index analysis took 167 ms [2019-01-11 14:57:32,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 14:57:32,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:32,975 INFO L303 Elim1Store]: Index analysis took 160 ms [2019-01-11 14:57:32,977 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 [2019-01-11 14:57:33,147 INFO L303 Elim1Store]: Index analysis took 159 ms [2019-01-11 14:57:33,151 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 [2019-01-11 14:57:33,153 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 14:57:33,803 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,190 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,251 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,300 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,339 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,391 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,420 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,453 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:34,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:34,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:57:34,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:34,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:34,751 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 [2019-01-11 14:57:35,067 WARN L181 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2019-01-11 14:57:35,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,102 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 [2019-01-11 14:57:35,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:57:35,316 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 14:57:35,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,359 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 [2019-01-11 14:57:35,489 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:57:35,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,509 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 [2019-01-11 14:57:35,710 WARN L181 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:57:35,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:35,733 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 [2019-01-11 14:57:35,735 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:57:35,822 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:35,883 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:35,951 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:36,047 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:36,121 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:36,524 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:36,629 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. [2019-01-11 14:57:36,630 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:57:36,804 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 14:57:36,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:36,865 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 [2019-01-11 14:57:36,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:57:37,141 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. [2019-01-11 14:57:37,142 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:57:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:57:37,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:57:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:57:37,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:57:37,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:57:37,253 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:57:37,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:57:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:57:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:57:37,254 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-11 14:57:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:57:49,329 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-11 14:57:49,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:57:49,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:57:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:57:49,333 INFO L225 Difference]: With dead ends: 71 [2019-01-11 14:57:49,333 INFO L226 Difference]: Without dead ends: 69 [2019-01-11 14:57:49,334 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 [2019-01-11 14:57:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-11 14:57:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-11 14:57:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-11 14:57:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-11 14:57:49,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-11 14:57:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:57:49,342 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-11 14:57:49,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:57:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-11 14:57:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:57:49,342 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:57:49,342 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:57:49,343 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:57:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:57:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-11 14:57:49,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:57:49,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:57:49,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:57:49,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:57:49,345 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:57:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:57:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:57:49,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:57:49,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:57:49,507 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:57:49,508 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-11 14:57:49,513 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 14:57:49,514 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:57:49,943 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:57:49,943 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. [2019-01-11 14:57:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:57:49,944 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:57:49,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:57:49,944 INFO 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 [2019-01-11 14:57:49,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:57:49,963 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:57:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:57:49,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:57:50,236 WARN L181 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-11 14:57:50,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,269 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 [2019-01-11 14:57:50,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:57:50,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:57:50,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:57:50,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 14:57:50,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,790 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 [2019-01-11 14:57:50,921 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:57:50,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:50,957 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 [2019-01-11 14:57:50,959 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,020 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,081 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,147 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,214 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,304 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,383 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,468 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 [2019-01-11 14:57:51,473 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 [2019-01-11 14:57:51,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 14:57:51,497 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 [2019-01-11 14:57:51,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:57:51,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:57:51,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 14:57:51,552 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 [2019-01-11 14:57:51,620 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 [2019-01-11 14:57:51,621 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,724 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,805 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,860 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,904 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,935 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,960 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,981 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:51,999 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:57:52,107 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. [2019-01-11 14:57:52,108 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:57:52,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:57:52,201 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 [2019-01-11 14:57:52,202 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:57:52,449 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. [2019-01-11 14:57:52,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:57:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:57:52,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:57:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:57:52,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:57:52,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:57:52,503 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:57:52,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:57:52,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:57:52,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:57:52,505 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-11 14:58:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:58:03,582 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-11 14:58:03,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 14:58:03,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:58:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:58:03,584 INFO L225 Difference]: With dead ends: 54 [2019-01-11 14:58:03,584 INFO L226 Difference]: Without dead ends: 52 [2019-01-11 14:58:03,585 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 [2019-01-11 14:58:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-11 14:58:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-11 14:58:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 14:58:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-11 14:58:03,592 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-11 14:58:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:58:03,593 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-11 14:58:03,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:58:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-11 14:58:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:58:03,593 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:58:03,593 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:58:03,594 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:58:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:58:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-11 14:58:03,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:58:03,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:58:03,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:58:03,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:58:03,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:58:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:58:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:58:03,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:58:03,750 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:58:03,750 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:58:03,750 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-11 14:58:03,752 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 14:58:03,752 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:58:06,421 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:58:06,422 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. [2019-01-11 14:58:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:58:06,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:58:06,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:58:06,423 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-11 14:58:06,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:58:06,434 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:58:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:58:06,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:58:06,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-01-11 14:58:06,496 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 [2019-01-11 14:58:06,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,506 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 [2019-01-11 14:58:06,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 14:58:06,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:58:06,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:58:06,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,565 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 [2019-01-11 14:58:06,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:06,599 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 [2019-01-11 14:58:06,619 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 [2019-01-11 14:58:06,620 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,705 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,767 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,815 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,852 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,883 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,912 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,938 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:06,962 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:07,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,020 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 [2019-01-11 14:58:07,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,074 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 [2019-01-11 14:58:07,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,137 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 [2019-01-11 14:58:07,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:58:07,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 14:58:07,446 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:58:07,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,460 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 [2019-01-11 14:58:07,585 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:58:07,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:07,603 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 [2019-01-11 14:58:07,604 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:58:07,660 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:07,719 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:07,774 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:07,835 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:07,900 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:07,968 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:58:08,105 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. [2019-01-11 14:58:08,106 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:58:09,822 WARN L181 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-11 14:58:09,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:58:09,959 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 [2019-01-11 14:58:09,961 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-11 14:58:10,094 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-11 14:58:14,315 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. [2019-01-11 14:58:14,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1215 [2019-01-11 14:59:56,047 WARN L181 SmtUtils]: Spent 1.65 m on a formula simplification that was a NOOP. DAG size: 648 [2019-01-11 14:59:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:59:56,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:59:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:59:56,086 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 14:59:56,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 14:59:56,086 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:59:56,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 14:59:56,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 14:59:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 14:59:56,087 INFO L87 Difference]: Start difference. First operand 29 states and 69 transitions. Second operand 4 states. [2019-01-11 14:59:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:59:56,147 INFO L93 Difference]: Finished difference Result 31 states and 80 transitions. [2019-01-11 14:59:56,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:59:56,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 14:59:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:59:56,149 INFO L225 Difference]: With dead ends: 31 [2019-01-11 14:59:56,149 INFO L226 Difference]: Without dead ends: 30 [2019-01-11 14:59:56,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 103.5s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 14:59:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-11 14:59:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-01-11 14:59:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 14:59:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 79 transitions. [2019-01-11 14:59:56,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 79 transitions. Word has length 3 [2019-01-11 14:59:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:59:56,158 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 79 transitions. [2019-01-11 14:59:56,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 14:59:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 79 transitions. [2019-01-11 14:59:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:59:56,159 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:59:56,159 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:59:56,159 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:59:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:59:56,159 INFO L82 PathProgramCache]: Analyzing trace with hash 31072, now seen corresponding path program 1 times [2019-01-11 14:59:56,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:59:56,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:59:56,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:59:56,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:59:56,161 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:59:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:59:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:59:56,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:59:56,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:59:56,225 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:59:56,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:59:56,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:59:56,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:59:56,226 INFO L87 Difference]: Start difference. First operand 30 states and 79 transitions. Second operand 3 states. [2019-01-11 14:59:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:59:56,327 INFO L93 Difference]: Finished difference Result 37 states and 80 transitions. [2019-01-11 14:59:56,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:59:56,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 14:59:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:59:56,329 INFO L225 Difference]: With dead ends: 37 [2019-01-11 14:59:56,329 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 14:59:56,329 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 [2019-01-11 14:59:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 14:59:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-01-11 14:59:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 14:59:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 78 transitions. [2019-01-11 14:59:56,336 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 78 transitions. Word has length 3 [2019-01-11 14:59:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:59:56,336 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 78 transitions. [2019-01-11 14:59:56,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:59:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 78 transitions. [2019-01-11 14:59:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:59:56,337 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:59:56,337 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:59:56,337 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:59:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:59:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash 30140, now seen corresponding path program 1 times [2019-01-11 14:59:56,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:59:56,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:59:56,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:59:56,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:59:56,338 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:59:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:59:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:59:56,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:59:56,439 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:59:56,439 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:59:56,440 INFO L207 CegarAbsIntRunner]: [0], [10], [39] [2019-01-11 14:59:56,441 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 14:59:56,441 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:59:56,691 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:59:56,691 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. [2019-01-11 14:59:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:59:56,692 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:59:56,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:59:56,692 INFO 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 [2019-01-11 14:59:56,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:59:56,703 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:59:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:59:56,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:59:56,803 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 [2019-01-11 14:59:56,806 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 [2019-01-11 14:59:56,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,811 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 [2019-01-11 14:59:56,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,822 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 [2019-01-11 14:59:56,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 14:59:56,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 14:59:56,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 14:59:56,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:56,877 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 [2019-01-11 14:59:56,951 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 [2019-01-11 14:59:56,952 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,070 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,134 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,196 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,234 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,261 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,287 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,307 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,329 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:57,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-11 14:59:57,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,456 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 [2019-01-11 14:59:57,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,519 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 [2019-01-11 14:59:57,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,592 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 [2019-01-11 14:59:57,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,705 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 [2019-01-11 14:59:57,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,839 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 [2019-01-11 14:59:57,960 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:59:57,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:57,978 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 [2019-01-11 14:59:57,980 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,044 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,185 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,242 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,302 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,362 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,421 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,524 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. [2019-01-11 14:59:58,524 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:59:58,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:59:58,590 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 [2019-01-11 14:59:58,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:59:58,684 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. [2019-01-11 14:59:58,684 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:59:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:59:58,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:59:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:59:58,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:59:58,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:59:58,798 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:59:58,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:59:58,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:59:58,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:59:58,799 INFO L87 Difference]: Start difference. First operand 30 states and 78 transitions. Second operand 6 states. [2019-01-11 15:00:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 15:00:10,703 INFO L93 Difference]: Finished difference Result 71 states and 131 transitions. [2019-01-11 15:00:10,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 15:00:10,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 15:00:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 15:00:10,705 INFO L225 Difference]: With dead ends: 71 [2019-01-11 15:00:10,706 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 15:00:10,706 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 [2019-01-11 15:00:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 15:00:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2019-01-11 15:00:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-11 15:00:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 88 transitions. [2019-01-11 15:00:10,713 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 88 transitions. Word has length 3 [2019-01-11 15:00:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 15:00:10,713 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 88 transitions. [2019-01-11 15:00:10,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 15:00:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 88 transitions. [2019-01-11 15:00:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 15:00:10,714 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 15:00:10,714 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 15:00:10,714 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 15:00:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 15:00:10,715 INFO L82 PathProgramCache]: Analyzing trace with hash 30636, now seen corresponding path program 1 times [2019-01-11 15:00:10,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 15:00:10,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 15:00:10,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 15:00:10,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 15:00:10,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 15:00:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 15:00:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 15:00:10,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 15:00:10,789 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 15:00:10,789 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 15:00:10,790 INFO L207 CegarAbsIntRunner]: [0], [26], [39] [2019-01-11 15:00:10,791 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 15:00:10,791 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 15:00:11,080 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 15:00:11,080 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. [2019-01-11 15:00:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 15:00:11,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 15:00:11,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 15:00:11,080 INFO 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 [2019-01-11 15:00:11,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 15:00:11,088 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 15:00:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 15:00:11,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 15:00:11,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,136 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 [2019-01-11 15:00:11,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-11 15:00:11,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 15:00:11,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 15:00:11,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,424 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 [2019-01-11 15:00:11,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,535 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 [2019-01-11 15:00:11,665 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 15:00:11,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:11,683 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 [2019-01-11 15:00:11,684 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:11,741 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:11,799 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:11,858 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:11,919 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:11,981 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,044 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,115 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 [2019-01-11 15:00:12,119 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 [2019-01-11 15:00:12,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-01-11 15:00:12,128 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 [2019-01-11 15:00:12,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 15:00:12,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 15:00:12,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-11 15:00:12,148 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 [2019-01-11 15:00:12,244 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 [2019-01-11 15:00:12,245 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,321 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,379 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,424 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,457 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,485 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,508 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,528 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,547 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:12,644 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. [2019-01-11 15:00:12,645 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 15:00:13,215 WARN L181 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 15:00:13,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:13,241 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 [2019-01-11 15:00:13,242 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:13,335 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. [2019-01-11 15:00:13,335 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 15:00:13,556 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2019-01-11 15:00:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 15:00:13,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 15:00:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 15:00:13,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 15:00:13,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 15:00:13,587 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 15:00:13,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 15:00:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 15:00:13,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 15:00:13,588 INFO L87 Difference]: Start difference. First operand 31 states and 88 transitions. Second operand 6 states. [2019-01-11 15:00:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 15:00:25,937 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2019-01-11 15:00:25,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 15:00:25,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 15:00:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 15:00:25,939 INFO L225 Difference]: With dead ends: 72 [2019-01-11 15:00:25,939 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 15:00:25,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 15:00:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 15:00:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2019-01-11 15:00:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-11 15:00:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 97 transitions. [2019-01-11 15:00:25,948 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 97 transitions. Word has length 3 [2019-01-11 15:00:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 15:00:25,948 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 97 transitions. [2019-01-11 15:00:25,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 15:00:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 97 transitions. [2019-01-11 15:00:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 15:00:25,949 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 15:00:25,949 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 15:00:25,949 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 15:00:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 15:00:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 941912, now seen corresponding path program 1 times [2019-01-11 15:00:25,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 15:00:25,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 15:00:25,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 15:00:25,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 15:00:25,951 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 15:00:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 15:00:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 15:00:26,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 15:00:26,116 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 15:00:26,116 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 15:00:26,116 INFO L207 CegarAbsIntRunner]: [0], [18], [34], [39] [2019-01-11 15:00:26,118 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 15:00:26,118 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 15:00:26,495 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 15:00:26,495 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 15:00:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 15:00:26,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 15:00:26,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 15:00:26,496 INFO 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 [2019-01-11 15:00:26,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 15:00:26,505 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 15:00:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 15:00:26,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 15:00:26,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,563 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 [2019-01-11 15:00:26,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,632 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 [2019-01-11 15:00:26,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,703 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 [2019-01-11 15:00:26,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 15:00:26,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:26,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 15:00:27,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,047 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 [2019-01-11 15:00:27,180 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 15:00:27,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:27,209 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 [2019-01-11 15:00:27,210 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,293 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,383 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,478 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,574 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,667 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,760 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,873 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 [2019-01-11 15:00:27,876 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 [2019-01-11 15:00:27,879 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 [2019-01-11 15:00:27,883 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 [2019-01-11 15:00:27,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-11 15:00:27,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 15:00:27,895 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 [2019-01-11 15:00:27,899 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 [2019-01-11 15:00:27,912 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 [2019-01-11 15:00:27,913 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:27,987 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,053 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,101 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,136 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,164 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,187 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,207 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,225 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,322 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. [2019-01-11 15:00:28,323 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 15:00:28,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,393 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 [2019-01-11 15:00:28,394 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,488 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. [2019-01-11 15:00:28,489 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 15:00:28,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:28,525 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 15:00:28,526 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 168 [2019-01-11 15:00:28,527 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:28,617 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. [2019-01-11 15:00:28,618 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-11 15:00:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 15:00:28,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 15:00:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 15:00:28,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 15:00:28,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 15:00:28,687 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 15:00:28,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 15:00:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 15:00:28,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-11 15:00:28,688 INFO L87 Difference]: Start difference. First operand 32 states and 97 transitions. Second operand 8 states. [2019-01-11 15:00:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 15:00:32,369 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2019-01-11 15:00:32,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 15:00:32,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 15:00:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 15:00:32,371 INFO L225 Difference]: With dead ends: 89 [2019-01-11 15:00:32,371 INFO L226 Difference]: Without dead ends: 87 [2019-01-11 15:00:32,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-01-11 15:00:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-01-11 15:00:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2019-01-11 15:00:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-11 15:00:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 107 transitions. [2019-01-11 15:00:32,383 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 107 transitions. Word has length 4 [2019-01-11 15:00:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 15:00:32,383 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 107 transitions. [2019-01-11 15:00:32,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 15:00:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 107 transitions. [2019-01-11 15:00:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 15:00:32,384 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 15:00:32,384 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 15:00:32,384 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 15:00:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 15:00:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash 941974, now seen corresponding path program 1 times [2019-01-11 15:00:32,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 15:00:32,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 15:00:32,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 15:00:32,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 15:00:32,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 15:00:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 15:00:32,664 WARN L181 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2019-01-11 15:00:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 15:00:32,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 15:00:32,688 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 15:00:32,689 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 15:00:32,689 INFO L207 CegarAbsIntRunner]: [0], [18], [36], [39] [2019-01-11 15:00:32,690 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 15:00:32,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 15:00:33,160 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 15:00:33,161 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 15:00:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 15:00:33,161 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 15:00:33,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 15:00:33,161 INFO 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 [2019-01-11 15:00:33,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 15:00:33,179 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 15:00:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 15:00:33,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 15:00:33,253 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 [2019-01-11 15:00:33,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 15:00:33,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,267 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 [2019-01-11 15:00:33,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 15:00:33,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,298 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 [2019-01-11 15:00:33,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-11 15:00:33,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,333 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 [2019-01-11 15:00:33,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,349 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 [2019-01-11 15:00:33,363 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 [2019-01-11 15:00:33,364 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,445 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,507 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,558 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,594 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,624 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,649 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,671 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,691 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:33,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,746 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 [2019-01-11 15:00:33,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,801 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 [2019-01-11 15:00:33,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 15:00:33,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:33,934 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 [2019-01-11 15:00:34,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,020 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 [2019-01-11 15:00:34,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,134 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 [2019-01-11 15:00:34,280 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 15:00:34,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:34,299 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 [2019-01-11 15:00:34,300 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:34,373 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:34,491 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:34,554 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:34,610 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:34,669 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:34,729 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 15:00:35,031 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. [2019-01-11 15:00:35,031 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 15:00:35,709 WARN L181 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-01-11 15:00:35,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:35,737 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 2 case distinctions, treesize of input 56 treesize of output 162 [2019-01-11 15:00:35,738 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 15:00:36,057 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 13 dim-0 vars, and 2 xjuncts. [2019-01-11 15:00:36,058 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:168, output treesize:258 [2019-01-11 15:00:36,195 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-01-11 15:00:36,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,253 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 15:00:36,255 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 137 treesize of output 211 [2019-01-11 15:00:36,256 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 15:00:36,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 15:00:36,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 32 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 142 treesize of output 204 [2019-01-11 15:00:36,590 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 15:00:36,649 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 128 xjuncts. [2019-01-11 15:00:39,051 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 2 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-11 15:00:39,052 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 17 variables, input treesize:280, output treesize:1007 [2019-01-11 15:00:41,229 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 15:00:41,231 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:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-01-11 15:00:41,235 INFO L168 Benchmark]: Toolchain (without parser) took 192298.79 ms. Allocated memory was 140.0 MB in the beginning and 336.1 MB in the end (delta: 196.1 MB). Free memory was 107.4 MB in the beginning and 271.4 MB in the end (delta: -163.9 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2019-01-11 15:00:41,236 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 15:00:41,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.64 ms. Allocated memory is still 140.0 MB. Free memory was 107.2 MB in the beginning and 104.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-11 15:00:41,237 INFO L168 Benchmark]: Boogie Preprocessor took 26.68 ms. Allocated memory is still 140.0 MB. Free memory was 104.8 MB in the beginning and 103.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 15:00:41,237 INFO L168 Benchmark]: RCFGBuilder took 522.93 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 89.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-01-11 15:00:41,238 INFO L168 Benchmark]: TraceAbstraction took 191681.57 ms. Allocated memory was 140.0 MB in the beginning and 336.1 MB in the end (delta: 196.1 MB). Free memory was 89.4 MB in the beginning and 271.4 MB in the end (delta: -181.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2019-01-11 15:00:41,242 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 0.21 ms. Allocated memory is still 140.0 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.64 ms. Allocated memory is still 140.0 MB. Free memory was 107.2 MB in the beginning and 104.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.68 ms. Allocated memory is still 140.0 MB. Free memory was 104.8 MB in the beginning and 103.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 522.93 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 89.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 191681.57 ms. Allocated memory was 140.0 MB in the beginning and 336.1 MB in the end (delta: 196.1 MB). Free memory was 89.4 MB in the beginning and 271.4 MB in the end (delta: -181.9 MB). Peak memory consumption was 14.2 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:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...