java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 14:05:04,709 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:05:04,711 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:05:04,727 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-08 14:05:04,729 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-08 14:05:04,730 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-08 14:05:04,732 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-08 14:05:04,734 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-08 14:05:04,736 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-08 14:05:04,738 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-08 14:05:04,740 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-08 14:05:04,781 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-08 14:05:04,799 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:05:04,799 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:05:04,801 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:05:04,801 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:05:04,801 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:05:04,801 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:05:04,802 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:05:04,802 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:05:04,802 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-08 14:05:04,802 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:05:04,802 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-08 14:05:04,802 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-08 14:05:04,803 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:05:04,803 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:05:04,804 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:05:04,804 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:05:04,805 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:05:04,806 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:05:04,806 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:05:04,807 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:05:04,807 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:05:04,807 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:05:04,807 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:05:04,807 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:05:04,807 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:05:04,808 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:05:04,808 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:05:04,808 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:05:04,809 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:05:04,809 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:05:04,809 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:05:04,809 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:05:04,809 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:05:04,810 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:05:04,810 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:05:04,810 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:05:04,810 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:05:04,810 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:05:04,810 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:05:04,811 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:05:04,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:05:04,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:05:04,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:05:04,865 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:05:04,865 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:05:04,866 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-08 14:05:04,867 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-08 14:05:04,919 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:05:04,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:05:04,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:05:04,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:05:04,922 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:05:04,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:04,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:04,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:05:04,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:05:04,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:05:04,989 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:05:05,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:05,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:05,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:05,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:05,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:05,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:05,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... [2019-01-08 14:05:05,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:05:05,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:05:05,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:05:05,029 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:05:05,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:05:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 14:05:05,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 14:05:05,618 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 14:05:05,618 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-08 14:05:05,620 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:05:05 BoogieIcfgContainer [2019-01-08 14:05:05,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:05:05,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:05:05,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:05:05,624 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:05:05,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:05:04" (1/2) ... [2019-01-08 14:05:05,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee4db79 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:05:05, skipping insertion in model container [2019-01-08 14:05:05,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:05:05" (2/2) ... [2019-01-08 14:05:05,628 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-08 14:05:05,639 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:05:05,647 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-08 14:05:05,662 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-08 14:05:05,695 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:05:05,695 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:05:05,696 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:05:05,696 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:05:05,696 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:05:05,696 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:05:05,696 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:05:05,696 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:05:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-08 14:05:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 14:05:05,717 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:05,718 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 14:05:05,721 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:05,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-08 14:05:05,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:05,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:05,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:05,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:05,780 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:05,958 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:05:05,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:05:05,959 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:05,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:05:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:05:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:05:05,980 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-08 14:05:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:06,293 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-08 14:05:06,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:05:06,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 14:05:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:06,309 INFO L225 Difference]: With dead ends: 41 [2019-01-08 14:05:06,309 INFO L226 Difference]: Without dead ends: 36 [2019-01-08 14:05:06,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:05:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-08 14:05:06,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-08 14:05:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-08 14:05:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-08 14:05:06,348 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-08 14:05:06,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:06,350 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-08 14:05:06,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:05:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-08 14:05:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:06,351 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:06,351 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:06,352 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:06,352 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-08 14:05:06,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:06,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:06,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:06,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:06,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:06,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:06,514 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:06,515 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:06,517 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-08 14:05:06,560 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:06,561 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:06,636 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:06,637 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:06,643 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:06,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:06,644 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:06,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:06,662 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:06,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:06,871 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-08 14:05:06,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-08 14:05:06,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-08 14:05:06,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:05:06,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:06,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:05:07,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,118 INFO L303 Elim1Store]: Index analysis took 113 ms [2019-01-08 14:05:07,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:05:07,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:05:07,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,340 INFO L303 Elim1Store]: Index analysis took 140 ms [2019-01-08 14:05:07,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:05:07,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:07,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:05:07,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:05:07,466 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:07,882 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,264 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,336 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,383 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,416 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,459 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,490 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,534 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:08,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:05:08,839 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-08 14:05:08,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:05:08,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:08,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:05:09,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:05:09,275 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-08 14:05:09,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:05:09,453 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-08 14:05:09,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:05:09,747 WARN L181 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:05:09,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:09,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:05:09,810 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,917 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:09,986 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,055 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,188 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,280 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,352 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,478 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:10,479 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:05:10,728 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-08 14:05:10,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:10,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-01-08 14:05:10,768 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:10,974 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:10,975 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-08 14:05:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:11,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:11,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:11,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:11,047 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:11,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:11,049 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-08 14:05:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:23,167 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-08 14:05:23,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:23,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:23,170 INFO L225 Difference]: With dead ends: 71 [2019-01-08 14:05:23,170 INFO L226 Difference]: Without dead ends: 69 [2019-01-08 14:05:23,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-08 14:05:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-08 14:05:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-08 14:05:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-08 14:05:23,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-08 14:05:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:23,180 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-08 14:05:23,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-08 14:05:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:23,181 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:23,181 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:23,181 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-08 14:05:23,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:23,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:23,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:23,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:23,183 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:23,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:23,312 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:23,312 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:23,312 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-08 14:05:23,313 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:23,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:23,324 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:23,324 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:23,325 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:23,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:23,325 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:23,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:23,334 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:23,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:23,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:05:23,624 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-08 14:05:23,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:05:23,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:05:23,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:05:23,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:05:24,134 WARN L181 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-08 14:05:24,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:05:24,301 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:05:24,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,434 INFO L303 Elim1Store]: Index analysis took 129 ms [2019-01-08 14:05:24,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:05:24,438 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,512 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,584 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,660 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,739 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,817 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:24,896 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-08 14:05:25,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-08 14:05:25,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:05:25,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:05:25,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:05:25,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:05:25,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:05:25,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:05:25,318 INFO L303 Elim1Store]: Index analysis took 178 ms [2019-01-08 14:05:25,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:05:25,322 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,421 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,485 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,534 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,571 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,601 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,626 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,648 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,669 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:25,778 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:05:25,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:05:25,831 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:26,077 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:26,078 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-08 14:05:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:26,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:26,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:26,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:26,173 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:26,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:26,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:26,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:26,174 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-08 14:05:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:37,459 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-08 14:05:37,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:05:37,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:37,461 INFO L225 Difference]: With dead ends: 54 [2019-01-08 14:05:37,461 INFO L226 Difference]: Without dead ends: 52 [2019-01-08 14:05:37,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-08 14:05:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-08 14:05:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-08 14:05:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-08 14:05:37,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-08 14:05:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:37,470 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-08 14:05:37,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-08 14:05:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:37,470 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:37,470 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:37,471 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:37,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:37,471 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-08 14:05:37,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:37,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:37,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:37,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:37,472 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:37,796 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 5 [2019-01-08 14:05:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:37,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:37,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:37,797 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:37,798 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-08 14:05:37,799 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:37,799 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:37,807 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:37,808 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:37,808 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:37,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:37,809 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:37,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:37,827 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:37,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:37,967 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-08 14:05:37,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-08 14:05:37,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-08 14:05:37,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:05:38,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:05:38,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:05:38,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:05:38,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:05:38,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:05:38,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:05:38,244 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,352 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,419 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,470 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,511 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,543 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,570 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,591 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,611 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:38,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:05:38,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:05:38,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:05:38,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:38,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:05:39,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:05:39,128 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-08 14:05:39,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:05:39,284 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:05:39,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:39,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:05:39,309 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:39,371 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:39,435 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:39,499 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:39,589 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:39,655 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:39,719 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:39,826 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:39,827 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:05:41,631 WARN L181 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-08 14:05:41,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:41,744 INFO L303 Elim1Store]: Index analysis took 105 ms [2019-01-08 14:05:41,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 16 case distinctions, treesize of input 56 treesize of output 190 [2019-01-08 14:05:41,818 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-08 14:05:41,970 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-08 14:05:46,420 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-08 14:05:46,421 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1255 [2019-01-08 14:07:27,266 WARN L181 SmtUtils]: Spent 1.63 m on a formula simplification that was a NOOP. DAG size: 668 [2019-01-08 14:07:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:27,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:27,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:07:27,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:07:27,336 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:07:27,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:07:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:07:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-08 14:07:27,337 INFO L87 Difference]: Start difference. First operand 29 states and 69 transitions. Second operand 4 states. [2019-01-08 14:07:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:27,399 INFO L93 Difference]: Finished difference Result 31 states and 80 transitions. [2019-01-08 14:07:27,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:07:27,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-08 14:07:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:27,401 INFO L225 Difference]: With dead ends: 31 [2019-01-08 14:07:27,401 INFO L226 Difference]: Without dead ends: 30 [2019-01-08 14:07:27,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.9s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-08 14:07:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-08 14:07:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-01-08 14:07:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-08 14:07:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 79 transitions. [2019-01-08 14:07:27,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 79 transitions. Word has length 3 [2019-01-08 14:07:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:27,408 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 79 transitions. [2019-01-08 14:07:27,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:07:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 79 transitions. [2019-01-08 14:07:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:07:27,409 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:27,409 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:07:27,409 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash 31072, now seen corresponding path program 1 times [2019-01-08 14:07:27,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:27,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:27,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:27,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:27,411 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:27,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:07:27,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:07:27,487 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:07:27,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:07:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:07:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:07:27,488 INFO L87 Difference]: Start difference. First operand 30 states and 79 transitions. Second operand 3 states. [2019-01-08 14:07:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:27,569 INFO L93 Difference]: Finished difference Result 37 states and 80 transitions. [2019-01-08 14:07:27,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:07:27,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-08 14:07:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:27,570 INFO L225 Difference]: With dead ends: 37 [2019-01-08 14:07:27,570 INFO L226 Difference]: Without dead ends: 36 [2019-01-08 14:07:27,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:07:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-08 14:07:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-01-08 14:07:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-08 14:07:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 78 transitions. [2019-01-08 14:07:27,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 78 transitions. Word has length 3 [2019-01-08 14:07:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:27,577 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 78 transitions. [2019-01-08 14:07:27,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:07:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 78 transitions. [2019-01-08 14:07:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:07:27,578 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:27,578 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:07:27,579 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash 30140, now seen corresponding path program 1 times [2019-01-08 14:07:27,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:27,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:27,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:27,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:27,580 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:27,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:27,688 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:27,688 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:07:27,688 INFO L207 CegarAbsIntRunner]: [0], [10], [39] [2019-01-08 14:07:27,692 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:27,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:27,705 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:27,706 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:07:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:27,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:27,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:27,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:27,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:27,719 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:27,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:27,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-08 14:07:27,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-08 14:07:27,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:07:27,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:07:27,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:07:27,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:07:27,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:07:27,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:27,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:07:28,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:07:28,045 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,197 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,262 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,308 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,346 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,376 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,403 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,450 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,472 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:28,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:07:28,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:07:28,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:07:28,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:07:28,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:07:28,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:28,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:07:29,043 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:07:29,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:07:29,061 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,116 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,171 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,228 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,292 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,350 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,409 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,506 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:29,507 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:07:29,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:29,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:07:29,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:29,719 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:29,719 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-08 14:07:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:29,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:29,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:29,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:07:29,772 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:29,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:07:29,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:07:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:07:29,773 INFO L87 Difference]: Start difference. First operand 30 states and 78 transitions. Second operand 6 states. [2019-01-08 14:07:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:41,669 INFO L93 Difference]: Finished difference Result 71 states and 131 transitions. [2019-01-08 14:07:41,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:07:41,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:07:41,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:41,672 INFO L225 Difference]: With dead ends: 71 [2019-01-08 14:07:41,672 INFO L226 Difference]: Without dead ends: 70 [2019-01-08 14:07:41,672 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 [2019-01-08 14:07:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-08 14:07:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2019-01-08 14:07:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-08 14:07:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 88 transitions. [2019-01-08 14:07:41,680 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 88 transitions. Word has length 3 [2019-01-08 14:07:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:41,680 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 88 transitions. [2019-01-08 14:07:41,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:07:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 88 transitions. [2019-01-08 14:07:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:07:41,681 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:41,681 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:07:41,681 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash 30636, now seen corresponding path program 1 times [2019-01-08 14:07:41,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:41,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:41,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:41,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:41,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:42,006 WARN L181 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2019-01-08 14:07:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:42,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:42,079 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:42,079 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:07:42,079 INFO L207 CegarAbsIntRunner]: [0], [26], [39] [2019-01-08 14:07:42,081 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:42,081 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:42,087 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:42,087 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:07:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:42,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:42,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:42,088 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:42,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:42,105 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:42,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:42,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:07:42,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:07:42,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:07:42,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:07:42,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:07:42,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:07:42,742 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:07:42,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:42,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:07:42,764 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:42,822 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:42,880 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:42,940 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,000 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,063 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,126 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-08 14:07:43,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-08 14:07:43,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:07:43,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:07:43,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:07:43,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:07:43,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:07:43,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:07:43,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:07:43,317 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,391 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,450 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,494 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,529 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,557 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,580 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,600 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,618 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:43,717 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:43,717 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-08 14:07:44,258 WARN L181 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-08 14:07:44,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:44,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:07:44,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:44,476 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:44,477 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-08 14:07:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:44,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:44,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:44,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:07:44,528 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:44,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:07:44,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:07:44,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:07:44,529 INFO L87 Difference]: Start difference. First operand 31 states and 88 transitions. Second operand 6 states. [2019-01-08 14:07:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:56,723 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2019-01-08 14:07:56,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:07:56,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:07:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:56,725 INFO L225 Difference]: With dead ends: 72 [2019-01-08 14:07:56,725 INFO L226 Difference]: Without dead ends: 70 [2019-01-08 14:07:56,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:07:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-08 14:07:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2019-01-08 14:07:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-08 14:07:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 97 transitions. [2019-01-08 14:07:56,735 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 97 transitions. Word has length 3 [2019-01-08 14:07:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:56,735 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 97 transitions. [2019-01-08 14:07:56,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:07:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 97 transitions. [2019-01-08 14:07:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:07:56,736 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:56,736 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:07:56,736 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash 941912, now seen corresponding path program 1 times [2019-01-08 14:07:56,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:56,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:56,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:56,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:56,738 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:56,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:56,856 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:56,857 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:07:56,857 INFO L207 CegarAbsIntRunner]: [0], [18], [34], [39] [2019-01-08 14:07:56,858 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:56,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:56,863 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:56,863 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:07:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:56,864 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:56,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:56,864 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:56,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:56,882 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:56,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:56,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:56,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:07:56,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:56,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:56,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:07:57,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:07:57,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:07:57,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:07:57,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:07:57,535 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:07:57,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:57,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:07:57,566 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:57,645 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:57,730 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:57,823 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:57,918 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,015 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,120 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-08 14:07:58,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-08 14:07:58,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:07:58,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:07:58,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:07:58,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:07:58,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:07:58,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:07:58,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:07:58,303 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,377 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,439 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,484 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,517 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,545 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,568 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,588 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,606 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:58,703 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. [2019-01-08 14:07:58,704 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-08 14:07:58,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:58,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-01-08 14:07:58,838 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,282 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. [2019-01-08 14:07:59,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-08 14:07:59,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:59,334 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:59,335 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 [2019-01-08 14:07:59,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:59,428 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:59,428 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-08 14:07:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:59,450 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:59,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:59,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:07:59,494 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:59,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:07:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:07:59,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:07:59,495 INFO L87 Difference]: Start difference. First operand 32 states and 97 transitions. Second operand 8 states. [2019-01-08 14:08:00,016 WARN L181 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2019-01-08 14:08:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:03,654 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2019-01-08 14:08:03,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:08:03,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:08:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:03,658 INFO L225 Difference]: With dead ends: 89 [2019-01-08 14:08:03,658 INFO L226 Difference]: Without dead ends: 87 [2019-01-08 14:08:03,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-01-08 14:08:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2019-01-08 14:08:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-08 14:08:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 107 transitions. [2019-01-08 14:08:03,667 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 107 transitions. Word has length 4 [2019-01-08 14:08:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:03,667 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 107 transitions. [2019-01-08 14:08:03,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:08:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 107 transitions. [2019-01-08 14:08:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:08:03,668 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:03,668 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:08:03,668 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:03,669 INFO L82 PathProgramCache]: Analyzing trace with hash 941974, now seen corresponding path program 1 times [2019-01-08 14:08:03,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:03,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:03,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:03,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:03,670 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:03,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:03,836 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:03,836 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:08:03,836 INFO L207 CegarAbsIntRunner]: [0], [18], [36], [39] [2019-01-08 14:08:03,837 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:03,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:03,843 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:03,843 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:08:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:03,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:03,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:03,844 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:03,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:03,854 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:03,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:03,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-08 14:08:03,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-08 14:08:03,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-08 14:08:03,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-08 14:08:03,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-08 14:08:03,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:08:04,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:08:04,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-08 14:08:04,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-08 14:08:04,090 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,172 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,234 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,284 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,319 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,350 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,377 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,400 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,420 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:04,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:08:04,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:08:04,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:08:04,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:08:04,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:08:04,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:04,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:08:05,002 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:08:05,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:05,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:08:05,023 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:05,077 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:05,386 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:05,442 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:05,500 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:05,558 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:05,617 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:05,977 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. [2019-01-08 14:08:05,978 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-08 14:08:06,215 WARN L181 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-01-08 14:08:06,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:06,243 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 [2019-01-08 14:08:06,245 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:08:06,561 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. [2019-01-08 14:08:06,561 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:168, output treesize:258 [2019-01-08 14:08:07,007 WARN L181 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-01-08 14:08:07,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,041 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:07,043 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 [2019-01-08 14:08:07,044 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:07,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:07,398 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 [2019-01-08 14:08:07,399 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-08 14:08:07,454 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 128 xjuncts. [2019-01-08 14:08:09,941 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. [2019-01-08 14:08:09,941 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 17 variables, input treesize:280, output treesize:1007 [2019-01-08 14:08:12,166 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:12,168 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 [2019-01-08 14:08:12,173 INFO L168 Benchmark]: Toolchain (without parser) took 187252.83 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 930.1 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -189.4 MB). Peak memory consumption was 740.7 MB. Max. memory is 7.1 GB. [2019-01-08 14:08:12,173 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:08:12,173 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:08:12,174 INFO L168 Benchmark]: Boogie Preprocessor took 39.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:08:12,174 INFO L168 Benchmark]: RCFGBuilder took 591.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-08 14:08:12,174 INFO L168 Benchmark]: TraceAbstraction took 186551.07 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 930.1 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -210.5 MB). Peak memory consumption was 719.6 MB. Max. memory is 7.1 GB. [2019-01-08 14:08:12,176 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 66.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 591.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 186551.07 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 930.1 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -210.5 MB). Peak memory consumption was 719.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory: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...