java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-10-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 14:32:37,693 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:32:37,695 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:32:37,708 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-08 14:32:37,708 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-08 14:32:37,709 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-08 14:32:37,711 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-08 14:32:37,713 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-08 14:32:37,714 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-08 14:32:37,715 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-08 14:32:37,716 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-08 14:32:37,741 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-08 14:32:37,754 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:32:37,755 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:32:37,755 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:32:37,756 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:32:37,756 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:32:37,756 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:32:37,756 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:32:37,756 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:32:37,757 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:32:37,757 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-08 14:32:37,757 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-08 14:32:37,757 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:32:37,757 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:32:37,758 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:32:37,758 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:32:37,758 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:32:37,759 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:32:37,759 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:32:37,759 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:32:37,759 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:32:37,759 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:32:37,760 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:32:37,760 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:32:37,760 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:32:37,760 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:32:37,760 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:32:37,761 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:32:37,761 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:32:37,761 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:32:37,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:32:37,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:32:37,762 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:32:37,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:32:37,762 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:32:37,762 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:32:37,762 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:32:37,762 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:32:37,763 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:32:37,763 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:32:37,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:32:37,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:32:37,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:32:37,812 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:32:37,813 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:32:37,814 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-10-unlimited.bpl [2019-01-08 14:32:37,814 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-10-unlimited.bpl' [2019-01-08 14:32:37,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:32:37,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:32:37,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:32:37,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:32:37,861 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:32:37,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:32:37,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:32:37,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:32:37,925 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:32:37,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/1) ... [2019-01-08 14:32:37,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:32:37,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:32:37,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:32:37,956 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:32:37,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (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 14:32:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 14:32:38,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 14:32:38,562 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 14:32:38,563 INFO L286 CfgBuilder]: Removed 23 assue(true) statements. [2019-01-08 14:32:38,564 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:32:38 BoogieIcfgContainer [2019-01-08 14:32:38,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:32:38,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:32:38,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:32:38,569 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:32:38,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:32:37" (1/2) ... [2019-01-08 14:32:38,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487a85cc and model type speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:32:38, skipping insertion in model container [2019-01-08 14:32:38,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:32:38" (2/2) ... [2019-01-08 14:32:38,573 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-10-unlimited.bpl [2019-01-08 14:32:38,584 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:32:38,596 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2019-01-08 14:32:38,612 INFO L257 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2019-01-08 14:32:38,645 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:32:38,645 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:32:38,645 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:32:38,645 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:32:38,646 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:32:38,646 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:32:38,646 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:32:38,646 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:32:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-01-08 14:32:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 14:32:38,667 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:38,668 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 14:32:38,671 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1004, now seen corresponding path program 1 times [2019-01-08 14:32:38,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:38,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:38,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:38,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:38,726 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:38,917 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 14:32:38,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:32:38,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:32:38,920 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:32:38,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:32:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:32:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:32:38,939 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-01-08 14:32:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:39,266 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2019-01-08 14:32:39,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:32:39,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 14:32:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:39,283 INFO L225 Difference]: With dead ends: 45 [2019-01-08 14:32:39,283 INFO L226 Difference]: Without dead ends: 40 [2019-01-08 14:32:39,287 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 14:32:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-01-08 14:32:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2019-01-08 14:32:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-01-08 14:32:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 41 transitions. [2019-01-08 14:32:39,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 41 transitions. Word has length 2 [2019-01-08 14:32:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:39,329 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 41 transitions. [2019-01-08 14:32:39,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:32:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 41 transitions. [2019-01-08 14:32:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:32:39,330 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:39,330 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:32:39,331 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash 30392, now seen corresponding path program 1 times [2019-01-08 14:32:39,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:39,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:39,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:39,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:39,334 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:39,535 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 14:32:39,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:39,536 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:39,537 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:32:39,539 INFO L207 CegarAbsIntRunner]: [0], [18], [43] [2019-01-08 14:32:39,606 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:32:39,606 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:32:41,071 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:32:41,073 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:32:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:41,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:32:41,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:41,081 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 14:32:41,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:41,099 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:32:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:41,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:41,366 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-01-08 14:32:41,404 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 33 treesize of output 36 [2019-01-08 14:32:41,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 42 [2019-01-08 14:32:41,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,450 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 38 treesize of output 52 [2019-01-08 14:32:41,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,498 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 40 treesize of output 66 [2019-01-08 14:32:41,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,614 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-01-08 14:32:41,616 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 42 treesize of output 84 [2019-01-08 14:32:41,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,761 INFO L303 Elim1Store]: Index analysis took 140 ms [2019-01-08 14:32:41,763 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 44 treesize of output 106 [2019-01-08 14:32:41,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:41,927 INFO L303 Elim1Store]: Index analysis took 159 ms [2019-01-08 14:32:41,929 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 46 treesize of output 132 [2019-01-08 14:32:41,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,096 INFO L303 Elim1Store]: Index analysis took 160 ms [2019-01-08 14:32:42,099 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 48 treesize of output 162 [2019-01-08 14:32:42,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:42,252 INFO L303 Elim1Store]: Index analysis took 136 ms [2019-01-08 14:32:42,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 14:32:42,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 195 [2019-01-08 14:32:42,326 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,008 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,136 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,315 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,440 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,494 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,540 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,579 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,610 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,645 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:43,741 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 146 treesize of output 140 [2019-01-08 14:32:43,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:43,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:43,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 127 [2019-01-08 14:32:43,943 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-01-08 14:32:43,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:43,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:43,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:43,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:43,964 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 106 treesize of output 123 [2019-01-08 14:32:44,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,076 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 88 treesize of output 122 [2019-01-08 14:32:44,265 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-01-08 14:32:44,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,305 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 73 treesize of output 130 [2019-01-08 14:32:44,441 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-01-08 14:32:44,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,468 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 61 treesize of output 145 [2019-01-08 14:32:44,634 WARN L181 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-01-08 14:32:44,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:44,669 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 167 [2019-01-08 14:32:45,095 WARN L181 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-01-08 14:32:45,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:45,208 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-01-08 14:32:45,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 145 [2019-01-08 14:32:45,214 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:45,304 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:45,402 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:45,525 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:45,631 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:45,753 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:45,864 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:45,970 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:46,150 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:32:46,151 INFO L202 ElimStorePlain]: Needed 19 recursive calls to eliminate 10 variables, input treesize:182, output treesize:195 [2019-01-08 14:32:46,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:32:46,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 190 [2019-01-08 14:32:46,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:46,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:32:46,553 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:200, output treesize:158 [2019-01-08 14:32:46,579 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 14:32:46,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:46,612 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 14:32:46,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:46,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:32:46,636 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:46,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:32:46,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:32:46,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:32:46,638 INFO L87 Difference]: Start difference. First operand 22 states and 41 transitions. Second operand 6 states. [2019-01-08 14:32:46,806 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2019-01-08 14:33:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:39,339 INFO L93 Difference]: Finished difference Result 79 states and 116 transitions. [2019-01-08 14:33:39,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:33:39,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:33:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:39,343 INFO L225 Difference]: With dead ends: 79 [2019-01-08 14:33:39,343 INFO L226 Difference]: Without dead ends: 77 [2019-01-08 14:33:39,344 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 14:33:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-08 14:33:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 26. [2019-01-08 14:33:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-08 14:33:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 57 transitions. [2019-01-08 14:33:39,352 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 57 transitions. Word has length 3 [2019-01-08 14:33:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:39,352 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 57 transitions. [2019-01-08 14:33:39,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:33:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 57 transitions. [2019-01-08 14:33:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:33:39,353 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:39,353 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:33:39,354 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash 30888, now seen corresponding path program 1 times [2019-01-08 14:33:39,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:39,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:39,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:39,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:39,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:39,450 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 14:33:39,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:39,450 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:39,451 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:33:39,451 INFO L207 CegarAbsIntRunner]: [0], [34], [43] [2019-01-08 14:33:39,453 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:33:39,454 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:33:40,017 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:33:40,017 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:33:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:40,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:33:40,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:40,018 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 14:33:40,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:40,036 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:33:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:40,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:40,276 WARN L181 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-01-08 14:33:40,281 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 33 treesize of output 36 [2019-01-08 14:33:40,285 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 36 treesize of output 42 [2019-01-08 14:33:40,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,291 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 38 treesize of output 52 [2019-01-08 14:33:40,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,305 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 40 treesize of output 66 [2019-01-08 14:33:40,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,328 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 42 treesize of output 84 [2019-01-08 14:33:40,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,369 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 44 treesize of output 106 [2019-01-08 14:33:40,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,384 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 46 treesize of output 132 [2019-01-08 14:33:40,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,408 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 48 treesize of output 162 [2019-01-08 14:33:40,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:40,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 14:33:40,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 195 [2019-01-08 14:33:40,454 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,569 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,657 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,729 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,789 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,890 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,932 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,963 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:40,991 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:41,018 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:41,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 140 [2019-01-08 14:33:41,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,171 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 127 treesize of output 127 [2019-01-08 14:33:41,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,248 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 106 treesize of output 123 [2019-01-08 14:33:41,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,337 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 88 treesize of output 122 [2019-01-08 14:33:41,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,460 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 73 treesize of output 130 [2019-01-08 14:33:41,573 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-01-08 14:33:41,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,607 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 61 treesize of output 145 [2019-01-08 14:33:41,760 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-01-08 14:33:41,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:41,794 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 167 [2019-01-08 14:33:42,084 WARN L181 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-01-08 14:33:42,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:42,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 145 [2019-01-08 14:33:42,123 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:42,204 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:42,301 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:42,492 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:42,596 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:42,703 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:42,811 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:42,916 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:43,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:33:43,110 INFO L202 ElimStorePlain]: Needed 19 recursive calls to eliminate 10 variables, input treesize:182, output treesize:195 [2019-01-08 14:33:43,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:33:43,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 196 [2019-01-08 14:33:43,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:43,385 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:33:43,386 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:200, output treesize:158 [2019-01-08 14:33:43,549 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 14:33:43,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:43,563 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 14:33:43,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:43,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:33:43,582 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:43,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:33:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:33:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:33:43,583 INFO L87 Difference]: Start difference. First operand 26 states and 57 transitions. Second operand 6 states. [2019-01-08 14:34:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:32,483 INFO L93 Difference]: Finished difference Result 79 states and 126 transitions. [2019-01-08 14:34:32,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:34:32,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:34:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:32,487 INFO L225 Difference]: With dead ends: 79 [2019-01-08 14:34:32,487 INFO L226 Difference]: Without dead ends: 77 [2019-01-08 14:34:32,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:34:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-08 14:34:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 31. [2019-01-08 14:34:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-08 14:34:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 75 transitions. [2019-01-08 14:34:32,502 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 75 transitions. Word has length 3 [2019-01-08 14:34:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:32,504 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 75 transitions. [2019-01-08 14:34:32,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:34:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 75 transitions. [2019-01-08 14:34:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:34:32,504 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:32,505 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:34:32,505 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash 30020, now seen corresponding path program 1 times [2019-01-08 14:34:32,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:32,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:32,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:32,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:32,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:32,618 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 14:34:32,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:32,618 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:32,618 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:34:32,619 INFO L207 CegarAbsIntRunner]: [0], [6], [43] [2019-01-08 14:34:32,620 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:34:32,620 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:34:33,028 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:34:33,028 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:34:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:33,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:34:33,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:33,029 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:34:33,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:33,042 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:34:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:33,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:33,130 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 33 treesize of output 36 [2019-01-08 14:34:33,137 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 36 treesize of output 42 [2019-01-08 14:34:33,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,149 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 38 treesize of output 52 [2019-01-08 14:34:33,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,162 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 40 treesize of output 66 [2019-01-08 14:34:33,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,178 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 42 treesize of output 84 [2019-01-08 14:34:33,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,263 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 44 treesize of output 106 [2019-01-08 14:34:33,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,287 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 46 treesize of output 132 [2019-01-08 14:34:33,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 162 [2019-01-08 14:34:33,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 14:34:33,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 195 [2019-01-08 14:34:33,405 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,517 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,606 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,675 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,731 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,776 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,810 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,841 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,866 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,890 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:33,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:33,961 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 146 treesize of output 140 [2019-01-08 14:34:34,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,023 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 127 treesize of output 127 [2019-01-08 14:34:34,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 123 [2019-01-08 14:34:34,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,186 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 88 treesize of output 122 [2019-01-08 14:34:34,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 130 [2019-01-08 14:34:34,392 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-01-08 14:34:34,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 145 [2019-01-08 14:34:34,545 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-01-08 14:34:34,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,564 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 167 [2019-01-08 14:34:34,745 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-01-08 14:34:34,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:34,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 145 [2019-01-08 14:34:34,807 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:34,886 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:34,968 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:35,050 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:35,134 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:35,218 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:35,305 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:35,393 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:35,573 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-01-08 14:34:35,573 INFO L202 ElimStorePlain]: Needed 19 recursive calls to eliminate 11 variables, input treesize:182, output treesize:195 [2019-01-08 14:34:35,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:35,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 196 [2019-01-08 14:34:35,621 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:35,807 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:34:35,808 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:200, output treesize:158 [2019-01-08 14:34:35,827 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 14:34:35,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:35,832 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 14:34:35,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:34:35,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:34:35,852 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:34:35,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:34:35,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:34:35,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:34:35,853 INFO L87 Difference]: Start difference. First operand 31 states and 75 transitions. Second operand 4 states. [2019-01-08 14:34:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:35,960 INFO L93 Difference]: Finished difference Result 37 states and 121 transitions. [2019-01-08 14:34:35,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:34:35,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-08 14:34:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:35,962 INFO L225 Difference]: With dead ends: 37 [2019-01-08 14:34:35,962 INFO L226 Difference]: Without dead ends: 36 [2019-01-08 14:34:35,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:34:35,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-08 14:34:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-01-08 14:34:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-01-08 14:34:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 120 transitions. [2019-01-08 14:34:35,971 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 120 transitions. Word has length 3 [2019-01-08 14:34:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:35,971 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 120 transitions. [2019-01-08 14:34:35,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:34:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 120 transitions. [2019-01-08 14:34:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:34:35,972 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:35,972 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:34:35,972 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash 31074, now seen corresponding path program 1 times [2019-01-08 14:34:35,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:35,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:35,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:35,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:35,974 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:36,098 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 14:34:36,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:36,099 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:36,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:34:36,099 INFO L207 CegarAbsIntRunner]: [0], [40], [43] [2019-01-08 14:34:36,101 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:34:36,101 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:34:39,198 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:34:39,199 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:34:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:39,200 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:34:39,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:39,200 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 14:34:39,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:39,218 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:34:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:39,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:39,344 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-01-08 14:34:39,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,348 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 178 treesize of output 169 [2019-01-08 14:34:39,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,423 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 156 treesize of output 153 [2019-01-08 14:34:39,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,511 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 132 treesize of output 146 [2019-01-08 14:34:39,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 142 [2019-01-08 14:34:39,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,714 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 93 treesize of output 147 [2019-01-08 14:34:39,841 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2019-01-08 14:34:39,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:39,857 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 78 treesize of output 159 [2019-01-08 14:34:40,004 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2019-01-08 14:34:40,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,026 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 178 [2019-01-08 14:34:40,219 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2019-01-08 14:34:40,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 204 [2019-01-08 14:34:40,485 WARN L181 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-01-08 14:34:40,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:40,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 46 disjoint index pairs (out of 45 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 181 [2019-01-08 14:34:40,511 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:40,621 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:40,800 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:40,944 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:41,070 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:41,201 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:41,332 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:41,462 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:41,597 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:41,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 36 [2019-01-08 14:34:41,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 17 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 42 [2019-01-08 14:34:41,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 52 [2019-01-08 14:34:41,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 30 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 66 [2019-01-08 14:34:41,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 35 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 84 [2019-01-08 14:34:41,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 39 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 106 [2019-01-08 14:34:41,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 42 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 132 [2019-01-08 14:34:41,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 44 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 162 [2019-01-08 14:34:41,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 14:34:41,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 231 [2019-01-08 14:34:41,887 INFO L267 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,077 INFO L267 ElimStorePlain]: Start of recursive call 19: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,175 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,253 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,314 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,360 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,394 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,426 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,450 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,473 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,663 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:34:42,664 INFO L202 ElimStorePlain]: Needed 20 recursive calls to eliminate 10 variables, input treesize:214, output treesize:231 [2019-01-08 14:34:42,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:34:42,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 46 disjoint index pairs (out of 45 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 237 [2019-01-08 14:34:42,749 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:42,957 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-01-08 14:34:42,959 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:241, output treesize:195 [2019-01-08 14:34:42,992 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 14:34:42,992 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:43,005 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 14:34:43,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:43,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:34:43,026 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:43,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:34:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:34:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:34:43,027 INFO L87 Difference]: Start difference. First operand 35 states and 120 transitions. Second operand 6 states. [2019-01-08 14:35:03,671 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) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Broken pipe at java.io.FileOutputStream.writeBytes(Native Method) at java.io.FileOutputStream.write(FileOutputStream.java:326) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-08 14:35:03,675 INFO L168 Benchmark]: Toolchain (without parser) took 145816.60 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -979.9 MB). Peak memory consumption was 133.7 MB. Max. memory is 7.1 GB. [2019-01-08 14:35:03,676 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:35:03,676 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:35:03,676 INFO L168 Benchmark]: Boogie Preprocessor took 30.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:35:03,676 INFO L168 Benchmark]: RCFGBuilder took 608.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-08 14:35:03,677 INFO L168 Benchmark]: TraceAbstraction took 145108.37 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 112.6 MB. Max. memory is 7.1 GB. [2019-01-08 14:35:03,679 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 64.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 608.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 145108.37 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 112.6 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) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...