java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-a9d37a5-m [2019-02-28 10:56:12,382 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-28 10:56:12,384 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-28 10:56:12,397 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-28 10:56:12,397 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-28 10:56:12,398 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-28 10:56:12,399 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-28 10:56:12,401 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-28 10:56:12,403 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-28 10:56:12,404 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-28 10:56:12,405 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-02-28 10:56:12,434 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 [2019-02-28 10:56:12,453 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-28 10:56:12,454 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-28 10:56:12,455 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-28 10:56:12,455 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-28 10:56:12,455 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-28 10:56:12,455 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-28 10:56:12,456 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-28 10:56:12,456 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-28 10:56:12,456 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-28 10:56:12,456 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-02-28 10:56:12,456 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-02-28 10:56:12,457 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-28 10:56:12,457 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-28 10:56:12,457 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-28 10:56:12,458 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-28 10:56:12,458 INFO L133 SettingsManager]: * Use SBE=true [2019-02-28 10:56:12,458 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-28 10:56:12,458 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-28 10:56:12,458 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-28 10:56:12,459 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-28 10:56:12,459 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-28 10:56:12,459 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-28 10:56:12,459 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-28 10:56:12,459 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-28 10:56:12,460 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-28 10:56:12,460 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-28 10:56:12,460 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-28 10:56:12,460 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-28 10:56:12,460 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-28 10:56:12,461 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-28 10:56:12,461 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:56:12,461 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-28 10:56:12,461 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-28 10:56:12,461 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-28 10:56:12,461 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-28 10:56:12,462 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-28 10:56:12,462 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in [2019-02-28 10:56:12,462 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-28 10:56:12,462 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-28 10:56:12,494 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-28 10:56:12,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-28 10:56:12,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-28 10:56:12,512 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-28 10:56:12,512 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-28 10:56:12,513 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-02-28 10:56:12,514 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-02-28 10:56:12,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-28 10:56:12,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-28 10:56:12,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-28 10:56:12,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-28 10:56:12,560 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-28 10:56:12,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-28 10:56:12,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-28 10:56:12,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-28 10:56:12,635 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-28 10:56:12,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/1) ... [2019-02-28 10:56:12,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-28 10:56:12,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-28 10:56:12,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-28 10:56:12,677 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-28 10:56:12,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (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:16092 -smt2 -in -t:200000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:56:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-28 10:56:12,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-28 10:56:13,352 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-28 10:56:13,353 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-02-28 10:56:13,354 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:56:13 BoogieIcfgContainer [2019-02-28 10:56:13,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-28 10:56:13,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-28 10:56:13,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-28 10:56:13,359 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-28 10:56:13,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:56:12" (1/2) ... [2019-02-28 10:56:13,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24fd9051 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.02 10:56:13, skipping insertion in model container [2019-02-28 10:56:13,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:56:13" (2/2) ... [2019-02-28 10:56:13,363 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-02-28 10:56:13,373 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-28 10:56:13,381 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-02-28 10:56:13,395 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-02-28 10:56:13,427 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-28 10:56:13,427 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-28 10:56:13,427 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-28 10:56:13,428 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-28 10:56:13,428 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-28 10:56:13,428 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-28 10:56:13,428 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-28 10:56:13,429 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-28 10:56:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-02-28 10:56:13,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-28 10:56:13,449 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:56:13,450 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-28 10:56:13,453 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:56:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:56:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-02-28 10:56:13,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:56:13,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:56:13,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:56:13,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:56:13,509 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:56:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:56:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:56:13,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:56:13,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-28 10:56:13,714 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:56:13,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-28 10:56:13,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-28 10:56:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:56:13,737 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-02-28 10:56:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:56:13,995 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-02-28 10:56:13,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:56:14,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-28 10:56:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:56:14,030 INFO L225 Difference]: With dead ends: 41 [2019-02-28 10:56:14,030 INFO L226 Difference]: Without dead ends: 36 [2019-02-28 10:56:14,034 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 [2019-02-28 10:56:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-02-28 10:56:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-02-28 10:56:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-02-28 10:56:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-02-28 10:56:14,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-02-28 10:56:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:56:14,073 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-02-28 10:56:14,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-28 10:56:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-02-28 10:56:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:56:14,074 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:56:14,074 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:56:14,075 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:56:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:56:14,075 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-02-28 10:56:14,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:56:14,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:56:14,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:56:14,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:56:14,077 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:56:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:56:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:56:14,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:56:14,244 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:56:14,245 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:56:14,247 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-02-28 10:56:14,305 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-28 10:56:14,305 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:56:15,511 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:56:15,514 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. [2019-02-28 10:56:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:56:15,526 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:56:15,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:56:15,526 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 [2019-02-28 10:56:15,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:56:15,542 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:56:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:56:15,570 WARN L254 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 17 conjunts are in the unsatisfiable core [2019-02-28 10:56:15,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:56:15,650 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-28 10:56:15,700 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,703 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2019-02-28 10:56:15,759 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,785 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,808 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,812 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:56:15,861 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,884 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,910 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,929 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,943 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,966 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:15,967 INFO L289 Elim1Store]: Index analysis took 127 ms [2019-02-28 10:56:15,971 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2019-02-28 10:56:16,021 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,046 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,068 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,085 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,088 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,090 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,095 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,098 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,100 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,102 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,102 INFO L289 Elim1Store]: Index analysis took 108 ms [2019-02-28 10:56:16,106 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2019-02-28 10:56:16,139 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,143 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,179 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,201 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,215 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,241 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,258 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,283 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,309 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,333 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,359 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,383 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,412 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,436 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,465 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,466 INFO L289 Elim1Store]: Index analysis took 337 ms [2019-02-28 10:56:16,472 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2019-02-28 10:56:16,526 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,558 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,582 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,596 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,598 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,600 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,604 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,607 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,612 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,616 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,623 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,624 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,626 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,628 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,630 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,638 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,639 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,640 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,642 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,644 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,646 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,646 INFO L289 Elim1Store]: Index analysis took 142 ms [2019-02-28 10:56:16,649 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2019-02-28 10:56:16,659 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,660 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,664 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,666 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,668 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,670 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,672 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,674 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,676 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,678 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,680 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,682 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,709 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,735 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,759 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,784 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,786 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,788 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,789 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,791 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,793 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,795 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,798 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,800 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,802 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,803 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,805 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,807 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,807 INFO L289 Elim1Store]: Index analysis took 149 ms [2019-02-28 10:56:16,811 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2019-02-28 10:56:16,870 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,893 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,908 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,931 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,943 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,945 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,946 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,948 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,950 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,953 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,955 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,957 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,959 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,961 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,964 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,967 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,969 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,971 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,973 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,974 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,976 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,978 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:16,979 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:17,005 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:17,020 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:17,021 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:17,024 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:17,025 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:56:17,026 INFO L289 Elim1Store]: Index analysis took 179 ms [2019-02-28 10:56:17,321 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 47 treesize of output 70 [2019-02-28 10:56:17,324 INFO L315 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,570 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,693 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,757 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,846 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,870 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,906 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,943 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:17,971 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,141 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2019-02-28 10:56:18,142 INFO L315 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,157 INFO L315 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,183 INFO L315 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,231 INFO L315 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,309 INFO L315 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,395 INFO L315 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,478 INFO L315 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,633 INFO L315 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:18,753 INFO L315 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-28 10:56:18,753 INFO L209 ElimStorePlain]: Needed 18 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-02-28 10:56:18,928 WARN L181 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-02-28 10:56:18,958 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2019-02-28 10:56:18,959 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:56:19,094 INFO L315 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-28 10:56:19,095 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:127 [2019-02-28 10:56:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:56:19,124 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:56:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:56:19,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:56:19,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-28 10:56:19,166 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:56:19,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:56:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:56:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:56:19,167 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-02-28 10:56:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:56:32,277 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-02-28 10:56:32,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-28 10:56:32,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-28 10:56:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:56:32,279 INFO L225 Difference]: With dead ends: 71 [2019-02-28 10:56:32,279 INFO L226 Difference]: Without dead ends: 69 [2019-02-28 10:56:32,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-28 10:56:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-02-28 10:56:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-02-28 10:56:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-02-28 10:56:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-02-28 10:56:32,288 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-02-28 10:56:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:56:32,289 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-02-28 10:56:32,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:56:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-02-28 10:56:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:56:32,289 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:56:32,290 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:56:32,290 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:56:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:56:32,291 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-02-28 10:56:32,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:56:32,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:56:32,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:56:32,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:56:32,292 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:56:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:56:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:56:32,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:56:32,413 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:56:32,413 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:56:32,413 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-02-28 10:56:32,416 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-28 10:56:32,416 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:56:32,847 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:56:32,847 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. [2019-02-28 10:56:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:56:32,848 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:56:32,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:56:32,848 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 [2019-02-28 10:56:32,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:56:32,864 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:56:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:56:32,884 WARN L254 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 17 conjunts are in the unsatisfiable core [2019-02-28 10:56:32,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:56:33,017 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2019-02-28 10:56:33,018 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,088 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,099 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,112 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,160 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,259 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,318 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,409 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,523 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-28 10:56:33,541 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2019-02-28 10:56:33,559 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:56:33,572 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2019-02-28 10:56:33,588 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2019-02-28 10:56:33,593 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2019-02-28 10:56:33,600 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2019-02-28 10:56:33,605 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2019-02-28 10:56:33,712 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 47 treesize of output 70 [2019-02-28 10:56:33,715 INFO L315 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,767 INFO L315 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,789 INFO L315 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,809 INFO L315 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,828 INFO L315 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,846 INFO L315 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,868 INFO L315 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,891 INFO L315 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:33,916 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:56:34,022 INFO L315 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-28 10:56:34,023 INFO L209 ElimStorePlain]: Needed 18 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158