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-b7bd044-m [2019-01-18 18:10:04,551 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 18:10:04,553 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 18:10:04,565 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-18 18:10:04,565 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-18 18:10:04,566 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-18 18:10:04,568 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-18 18:10:04,569 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-18 18:10:04,571 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-18 18:10:04,572 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-18 18:10:04,573 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-18 18:10:04,573 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-18 18:10:04,574 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-18 18:10:04,575 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-18 18:10:04,576 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-18 18:10:04,577 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-18 18:10:04,578 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-18 18:10:04,580 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-18 18:10:04,582 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-18 18:10:04,583 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-18 18:10:04,585 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-18 18:10:04,586 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-18 18:10:04,588 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-18 18:10:04,589 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-18 18:10:04,589 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-18 18:10:04,590 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-18 18:10:04,591 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-18 18:10:04,592 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-18 18:10:04,593 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-18 18:10:04,594 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-18 18:10:04,594 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-18 18:10:04,595 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-18 18:10:04,595 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-18 18:10:04,595 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-18 18:10:04,596 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-18 18:10:04,597 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-18 18:10:04,597 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 [2019-01-18 18:10:04,614 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 18:10:04,615 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 18:10:04,616 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 18:10:04,619 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 18:10:04,619 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 18:10:04,619 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 18:10:04,619 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 18:10:04,620 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 18:10:04,620 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 18:10:04,621 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-18 18:10:04,621 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-18 18:10:04,621 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 18:10:04,621 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 18:10:04,622 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 18:10:04,622 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 18:10:04,622 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 18:10:04,623 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 18:10:04,623 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 18:10:04,623 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 18:10:04,623 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 18:10:04,623 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 18:10:04,624 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 18:10:04,625 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 18:10:04,625 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 18:10:04,625 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 18:10:04,625 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 18:10:04,626 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 18:10:04,626 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 18:10:04,626 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 18:10:04,626 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 18:10:04,626 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 18:10:04,627 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 18:10:04,628 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 18:10:04,628 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 18:10:04,628 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 18:10:04,628 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 18:10:04,629 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 18:10:04,630 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 18:10:04,630 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 18:10:04,672 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 18:10:04,684 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 18:10:04,688 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 18:10:04,690 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 18:10:04,690 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 18:10:04,691 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-18 18:10:04,691 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-18 18:10:04,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 18:10:04,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 18:10:04,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 18:10:04,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 18:10:04,736 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 18:10:04,753 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,766 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 18:10:04,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 18:10:04,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 18:10:04,795 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 18:10:04,806 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,806 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,808 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,809 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,813 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,817 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,819 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 18.01 06:10:04" (1/1) ... [2019-01-18 18:10:04,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 18:10:04,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 18:10:04,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 18:10:04,822 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 18:10:04,823 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 18.01 06:10:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -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:2024 -smt2 -in -t:2000 [2019-01-18 18:10:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 18:10:04,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 18:10:05,308 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 18:10:05,308 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-18 18:10:05,309 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:10:05 BoogieIcfgContainer [2019-01-18 18:10:05,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 18:10:05,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 18:10:05,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 18:10:05,316 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 18:10:05,316 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 18.01 06:10:04" (1/2) ... [2019-01-18 18:10:05,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4384092c and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:10:05, skipping insertion in model container [2019-01-18 18:10:05,318 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 18.01 06:10:05" (2/2) ... [2019-01-18 18:10:05,321 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-18 18:10:05,332 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 18:10:05,344 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-18 18:10:05,361 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-18 18:10:05,400 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 18:10:05,400 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 18:10:05,400 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 18:10:05,401 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 18:10:05,401 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 18:10:05,401 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 18:10:05,401 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 18:10:05,401 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 18:10:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-18 18:10:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 18:10:05,436 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:05,437 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 18:10:05,440 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-18 18:10:05,449 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:05,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:05,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:05,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:05,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:05,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 18:10:05,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 18:10:05,789 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:10:05,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 18:10:05,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 18:10:05,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 18:10:05,812 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-18 18:10:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:06,211 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-18 18:10:06,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 18:10:06,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 18:10:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:06,227 INFO L225 Difference]: With dead ends: 41 [2019-01-18 18:10:06,228 INFO L226 Difference]: Without dead ends: 36 [2019-01-18 18:10:06,231 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 [2019-01-18 18:10:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-18 18:10:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-18 18:10:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-18 18:10:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-18 18:10:06,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-18 18:10:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:06,287 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-18 18:10:06,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 18:10:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-18 18:10:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:06,288 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:06,288 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:06,289 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:06,289 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-18 18:10:06,289 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:06,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:06,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:06,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:06,291 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:06,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:06,437 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:06,439 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:10:06,441 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-18 18:10:06,498 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:06,498 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:07,667 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:07,668 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. [2019-01-18 18:10:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:07,675 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:07,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:07,676 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 [2019-01-18 18:10:07,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:07,690 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:07,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:07,892 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-18 18:10:07,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-18 18:10:07,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-18 18:10:07,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-18 18:10:07,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:07,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-18 18:10:08,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,122 INFO L303 Elim1Store]: Index analysis took 115 ms [2019-01-18 18:10:08,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-18 18:10:08,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,272 INFO L303 Elim1Store]: Index analysis took 142 ms [2019-01-18 18:10:08,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 18:10:08,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,448 INFO L303 Elim1Store]: Index analysis took 167 ms [2019-01-18 18:10:08,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-18 18:10:08,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:08,650 INFO L303 Elim1Store]: Index analysis took 195 ms [2019-01-18 18:10:08,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-18 18:10:08,768 INFO L303 Elim1Store]: Index analysis took 110 ms [2019-01-18 18:10:08,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-18 18:10:08,772 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,205 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,590 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,758 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,818 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,883 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,934 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:09,961 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,000 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:10,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:10:10,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:10:10,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:10:10,421 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-18 18:10:10,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:10:10,588 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-18 18:10:10,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:10:10,745 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 18:10:10,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:10,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:10:10,989 WARN L181 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:10:10,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:11,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:10:11,019 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,111 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,170 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,231 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,298 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,377 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,704 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:11,809 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:11,810 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-18 18:10:11,962 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-18 18:10:12,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:12,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-01-18 18:10:12,019 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:12,178 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:12,180 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-18 18:10:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:12,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:12,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:12,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:10:12,285 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:12,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:10:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:10:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:10:12,287 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-18 18:10:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:24,308 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-18 18:10:24,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:10:24,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:10:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:24,312 INFO L225 Difference]: With dead ends: 71 [2019-01-18 18:10:24,312 INFO L226 Difference]: Without dead ends: 69 [2019-01-18 18:10:24,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 18:10:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-18 18:10:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-18 18:10:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-18 18:10:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-18 18:10:24,321 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-18 18:10:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:24,321 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-18 18:10:24,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:10:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-18 18:10:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:24,322 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:24,322 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:24,323 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:24,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-18 18:10:24,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:24,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:24,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:24,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:24,325 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:24,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:24,454 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:24,454 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:10:24,455 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-18 18:10:24,457 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:24,457 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:24,891 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:24,892 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. [2019-01-18 18:10:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:24,892 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:24,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:24,893 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 [2019-01-18 18:10:24,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:24,909 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:24,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:25,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:10:25,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:10:25,343 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2019-01-18 18:10:25,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 18:10:25,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:10:25,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:10:25,653 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 18:10:25,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:10:25,821 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:10:25,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:25,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:10:25,857 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:25,930 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:25,990 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,051 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,115 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,205 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,273 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-18 18:10:26,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-18 18:10:26,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-18 18:10:26,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-18 18:10:26,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-18 18:10:26,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 18:10:26,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-18 18:10:26,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-18 18:10:26,582 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-01-18 18:10:26,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-18 18:10:26,585 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,666 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,729 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,778 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,823 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,858 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,887 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,912 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:26,935 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:27,052 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:27,053 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-18 18:10:27,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:27,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 18:10:27,107 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:27,364 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:27,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-18 18:10:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:27,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:27,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:27,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:10:27,443 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:27,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:10:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:10:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:10:27,444 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-18 18:10:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:38,646 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-18 18:10:38,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 18:10:38,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 18:10:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:38,648 INFO L225 Difference]: With dead ends: 54 [2019-01-18 18:10:38,648 INFO L226 Difference]: Without dead ends: 52 [2019-01-18 18:10:38,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:10:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-18 18:10:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-18 18:10:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-18 18:10:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-18 18:10:38,656 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-18 18:10:38,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:38,656 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-18 18:10:38,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:10:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-18 18:10:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 18:10:38,657 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:38,657 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 18:10:38,657 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-18 18:10:38,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:38,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:38,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:38,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:38,658 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:38,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:38,771 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:38,771 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 18:10:38,771 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-18 18:10:38,773 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:10:38,773 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:10:41,648 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:10:41,648 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. [2019-01-18 18:10:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:41,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:10:41,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:41,650 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 [2019-01-18 18:10:41,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:41,661 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:41,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:41,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-18 18:10:41,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-18 18:10:41,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-18 18:10:41,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-18 18:10:41,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-18 18:10:41,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 18:10:41,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-18 18:10:41,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:41,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-18 18:10:41,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-18 18:10:41,883 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:41,993 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,063 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,113 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,154 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,186 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,212 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,232 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,253 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:42,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 18:10:42,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 18:10:42,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,511 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 83 treesize of output 103 [2019-01-18 18:10:42,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 18:10:42,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 18:10:42,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 18:10:42,933 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 18:10:42,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:42,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 18:10:42,953 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,009 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,070 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,136 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,208 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,281 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,364 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:43,470 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 18:10:43,470 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-18 18:10:45,267 WARN L181 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-18 18:10:45,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 18:10:45,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 16 case distinctions, treesize of input 56 treesize of output 190 [2019-01-18 18:10:45,391 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-18 18:10:45,546 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-18 18:10:49,437 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-18 18:10:49,438 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1367 [2019-01-18 18:11:00,226 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-18 18:11:00,427 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 18:11:00,428 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:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-01-18 18:11:00,435 INFO L168 Benchmark]: Toolchain (without parser) took 55700.66 ms. Allocated memory was 142.1 MB in the beginning and 532.2 MB in the end (delta: 390.1 MB). Free memory was 109.7 MB in the beginning and 436.6 MB in the end (delta: -326.9 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2019-01-18 18:11:00,436 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 142.1 MB. Free memory is still 111.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 18:11:00,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.27 ms. Allocated memory is still 142.1 MB. Free memory was 109.5 MB in the beginning and 107.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-18 18:11:00,437 INFO L168 Benchmark]: Boogie Preprocessor took 26.20 ms. Allocated memory is still 142.1 MB. Free memory was 107.1 MB in the beginning and 105.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-18 18:11:00,438 INFO L168 Benchmark]: RCFGBuilder took 488.22 ms. Allocated memory is still 142.1 MB. Free memory was 105.8 MB in the beginning and 92.0 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-01-18 18:11:00,439 INFO L168 Benchmark]: TraceAbstraction took 55124.00 ms. Allocated memory was 142.1 MB in the beginning and 532.2 MB in the end (delta: 390.1 MB). Free memory was 91.8 MB in the beginning and 436.6 MB in the end (delta: -344.8 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2019-01-18 18:11:00,442 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 0.20 ms. Allocated memory is still 142.1 MB. Free memory is still 111.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 58.27 ms. Allocated memory is still 142.1 MB. Free memory was 109.5 MB in the beginning and 107.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.20 ms. Allocated memory is still 142.1 MB. Free memory was 107.1 MB in the beginning and 105.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 488.22 ms. Allocated memory is still 142.1 MB. Free memory was 105.8 MB in the beginning and 92.0 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 55124.00 ms. Allocated memory was 142.1 MB in the beginning and 532.2 MB in the end (delta: 390.1 MB). Free memory was 91.8 MB in the beginning and 436.6 MB in the end (delta: -344.8 MB). Peak memory consumption was 45.3 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:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...