java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0302a3f [2019-02-25 15:23:22,302 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-25 15:23:22,304 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-25 15:23:22,319 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-25 15:23:22,320 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-25 15:23:22,323 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-25 15:23:22,325 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-25 15:23:22,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-25 15:23:22,329 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-25 15:23:22,332 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-25 15:23:22,332 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-02-25 15:23:22,333 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-02-25 15:23:22,334 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-02-25 15:23:22,335 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-02-25 15:23:22,336 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-02-25 15:23:22,336 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-02-25 15:23:22,337 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-02-25 15:23:22,339 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-02-25 15:23:22,345 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-02-25 15:23:22,349 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-02-25 15:23:22,351 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-02-25 15:23:22,354 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-02-25 15:23:22,356 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-02-25 15:23:22,356 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-02-25 15:23:22,356 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-02-25 15:23:22,359 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-02-25 15:23:22,360 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-02-25 15:23:22,362 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-02-25 15:23:22,363 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-02-25 15:23:22,366 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-02-25 15:23:22,366 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-02-25 15:23:22,367 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-02-25 15:23:22,367 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-02-25 15:23:22,367 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-02-25 15:23:22,368 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-02-25 15:23:22,368 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-02-25 15:23:22,370 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-02-25 15:23:22,391 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-25 15:23:22,393 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-25 15:23:22,394 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-25 15:23:22,394 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-25 15:23:22,395 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-25 15:23:22,395 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-25 15:23:22,395 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-25 15:23:22,395 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-25 15:23:22,396 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-25 15:23:22,396 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-25 15:23:22,396 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-25 15:23:22,396 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-25 15:23:22,396 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-25 15:23:22,397 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-25 15:23:22,397 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-25 15:23:22,397 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-25 15:23:22,398 INFO L133 SettingsManager]: * Use SBE=true [2019-02-25 15:23:22,398 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-25 15:23:22,399 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-25 15:23:22,399 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-25 15:23:22,399 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-25 15:23:22,399 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-25 15:23:22,399 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-25 15:23:22,400 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-25 15:23:22,400 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-25 15:23:22,400 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-25 15:23:22,400 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-25 15:23:22,400 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-25 15:23:22,401 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-25 15:23:22,402 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-25 15:23:22,402 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-25 15:23:22,402 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-02-25 15:23:22,402 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-25 15:23:22,403 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-25 15:23:22,403 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-25 15:23:22,403 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-25 15:23:22,403 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-25 15:23:22,403 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-02-25 15:23:22,404 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-25 15:23:22,404 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-25 15:23:22,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-25 15:23:22,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-25 15:23:22,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-25 15:23:22,461 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-25 15:23:22,462 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-25 15:23:22,462 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-limited.bpl [2019-02-25 15:23:22,463 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-limited.bpl' [2019-02-25 15:23:22,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-25 15:23:22,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-25 15:23:22,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-25 15:23:22,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-25 15:23:22,507 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-25 15:23:22,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-25 15:23:22,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-25 15:23:22,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-25 15:23:22,572 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-25 15:23:22,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/1) ... [2019-02-25 15:23:22,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-25 15:23:22,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-25 15:23:22,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-25 15:23:22,598 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-25 15:23:22,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (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 [2019-02-25 15:23:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-25 15:23:22,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-25 15:23:23,159 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-25 15:23:23,159 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-02-25 15:23:23,161 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.02 03:23:23 BoogieIcfgContainer [2019-02-25 15:23:23,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-25 15:23:23,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-25 15:23:23,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-25 15:23:23,164 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-25 15:23:23,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.02 03:23:22" (1/2) ... [2019-02-25 15:23:23,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234468fa and model type speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.02 03:23:23, skipping insertion in model container [2019-02-25 15:23:23,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.02 03:23:23" (2/2) ... [2019-02-25 15:23:23,168 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-limited.bpl [2019-02-25 15:23:23,175 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-25 15:23:23,182 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-02-25 15:23:23,194 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-02-25 15:23:23,220 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-25 15:23:23,220 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-25 15:23:23,221 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-25 15:23:23,221 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-25 15:23:23,221 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-25 15:23:23,221 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-25 15:23:23,221 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-25 15:23:23,222 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-25 15:23:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-02-25 15:23:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-25 15:23:23,241 INFO L394 BasicCegarLoop]: Found error trace [2019-02-25 15:23:23,242 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-25 15:23:23,245 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT]=== [2019-02-25 15:23:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:23:23,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-02-25 15:23:23,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-25 15:23:23,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:23:23,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:23:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:23:23,292 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-25 15:23:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:23:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:23:23,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-25 15:23:23,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-25 15:23:23,448 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-25 15:23:23,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-25 15:23:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-25 15:23:23,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-25 15:23:23,469 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-02-25 15:23:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-25 15:23:23,712 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-02-25 15:23:23,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-25 15:23:23,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-25 15:23:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-25 15:23:23,727 INFO L225 Difference]: With dead ends: 41 [2019-02-25 15:23:23,727 INFO L226 Difference]: Without dead ends: 36 [2019-02-25 15:23:23,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-25 15:23:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-02-25 15:23:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-02-25 15:23:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-02-25 15:23:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-02-25 15:23:23,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-02-25 15:23:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-25 15:23:23,768 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-02-25 15:23:23,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-25 15:23:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-02-25 15:23:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-25 15:23:23,769 INFO L394 BasicCegarLoop]: Found error trace [2019-02-25 15:23:23,769 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-25 15:23:23,770 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT]=== [2019-02-25 15:23:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:23:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-02-25 15:23:23,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-25 15:23:23,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:23:23,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:23:23,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-25 15:23:23,784 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-25 15:23:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:23:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:23:23,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:23:23,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-25 15:23:23,987 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-25 15:23:23,989 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-02-25 15:23:24,027 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-25 15:23:24,028 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-25 15:23:24,122 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-25 15:23:24,123 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 110 root evaluator evaluations with a maximum evaluation depth of 3. Performed 110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-25 15:23:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-25 15:23:24,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-25 15:23:24,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-25 15:23:24,130 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-25 15:23:24,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-25 15:23:24,146 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-25 15:23:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-25 15:23:24,184 WARN L254 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 21 conjunts are in the unsatisfiable core [2019-02-25 15:23:24,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-25 15:23:24,258 INFO L467 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-02-25 15:23:24,275 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,279 INFO L467 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 [2019-02-25 15:23:24,326 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,351 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,353 INFO L467 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 [2019-02-25 15:23:24,395 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,397 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,406 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,409 INFO L467 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 [2019-02-25 15:23:24,450 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,452 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,453 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,456 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,458 INFO L467 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 [2019-02-25 15:23:24,483 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,487 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,488 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,490 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,505 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,508 INFO L467 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 [2019-02-25 15:23:24,547 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,548 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,550 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,556 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,559 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,627 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,627 INFO L292 Elim1Store]: Index analysis took 107 ms [2019-02-25 15:23:24,630 INFO L467 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 [2019-02-25 15:23:24,672 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,690 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,712 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,733 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,759 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,784 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,797 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,798 INFO L292 Elim1Store]: Index analysis took 160 ms [2019-02-25 15:23:24,801 INFO L467 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 [2019-02-25 15:23:24,821 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,823 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,828 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,831 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,833 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,835 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,837 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,839 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:24,844 INFO L467 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 190 [2019-02-25 15:23:24,846 INFO L301 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-02-25 15:23:25,446 INFO L301 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:25,667 INFO L301 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:25,751 INFO L301 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:25,844 INFO L301 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:25,895 INFO L301 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:25,979 INFO L301 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,029 INFO L301 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,092 INFO L301 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,205 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,207 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,215 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,217 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,218 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,225 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,227 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,228 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,229 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,237 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,248 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,250 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,250 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,252 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,253 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,255 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,265 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,266 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,272 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,274 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,276 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,277 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,278 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,293 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,295 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,297 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,301 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,303 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,305 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,307 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,308 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,309 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,309 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,311 INFO L467 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-25 15:23:26,312 INFO L301 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,317 INFO L301 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,320 INFO L301 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,322 INFO L301 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,325 INFO L301 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,328 INFO L301 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,377 INFO L301 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-25 15:23:26,378 INFO L208 ElimStorePlain]: Needed 16 recursive calls to eliminate 9 variables, input treesize:149, output treesize:70 [2019-02-25 15:23:26,484 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,498 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,500 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,502 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,503 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,503 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,504 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,505 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,506 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,508 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,509 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,510 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,512 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,513 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,514 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,516 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,517 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,518 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,521 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,523 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,524 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,525 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,526 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,527 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,527 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,531 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,531 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,532 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,533 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,535 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,536 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,537 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,539 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,540 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,541 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,543 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,544 INFO L176 IndexEqualityManager]: detected not equals via solver [2019-02-25 15:23:26,544 INFO L292 Elim1Store]: Index analysis took 107 ms [2019-02-25 15:23:26,548 INFO L467 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 190 [2019-02-25 15:23:26,550 INFO L301 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-25 15:23:26,859 INFO L301 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-02-25 15:23:26,859 INFO L208 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:80, output treesize:70 [2019-02-25 15:23:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:23:29,749 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-25 15:23:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-25 15:23:29,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-25 15:23:29,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-25 15:23:29,799 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-25 15:23:29,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-25 15:23:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-25 15:23:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-02-25 15:23:29,800 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-02-25 15:23:52,748 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-02-25 15:23:52,750 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) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-02-25 15:23:52,754 INFO L168 Benchmark]: Toolchain (without parser) took 30249.12 ms. Allocated memory was 134.7 MB in the beginning and 253.2 MB in the end (delta: 118.5 MB). Free memory was 109.6 MB in the beginning and 151.0 MB in the end (delta: -41.5 MB). Peak memory consumption was 77.0 MB. Max. memory is 7.1 GB. [2019-02-25 15:23:52,756 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 134.7 MB. Free memory is still 110.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-25 15:23:52,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.21 ms. Allocated memory is still 134.7 MB. Free memory was 109.6 MB in the beginning and 107.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-02-25 15:23:52,757 INFO L168 Benchmark]: Boogie Preprocessor took 25.99 ms. Allocated memory is still 134.7 MB. Free memory was 107.4 MB in the beginning and 106.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-25 15:23:52,758 INFO L168 Benchmark]: RCFGBuilder took 563.30 ms. Allocated memory is still 134.7 MB. Free memory was 105.7 MB in the beginning and 91.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-02-25 15:23:52,759 INFO L168 Benchmark]: TraceAbstraction took 29591.26 ms. Allocated memory was 134.7 MB in the beginning and 253.2 MB in the end (delta: 118.5 MB). Free memory was 91.9 MB in the beginning and 151.0 MB in the end (delta: -59.1 MB). Peak memory consumption was 59.4 MB. Max. memory is 7.1 GB. [2019-02-25 15:23:52,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 134.7 MB. Free memory is still 110.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 64.21 ms. Allocated memory is still 134.7 MB. Free memory was 109.6 MB in the beginning and 107.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.99 ms. Allocated memory is still 134.7 MB. Free memory was 107.4 MB in the beginning and 106.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 563.30 ms. Allocated memory is still 134.7 MB. Free memory was 105.7 MB in the beginning and 91.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29591.26 ms. Allocated memory was 134.7 MB in the beginning and 253.2 MB in the end (delta: 118.5 MB). Free memory was 91.9 MB in the beginning and 151.0 MB in the end (delta: -59.1 MB). Peak memory consumption was 59.4 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) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...