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/20170304-DifficultPathPrograms/mcmillan2006.c.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fa1c628-m [2019-01-31 17:21:09,591 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-31 17:21:09,593 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-31 17:21:09,608 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-31 17:21:09,608 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-31 17:21:09,610 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-31 17:21:09,611 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-31 17:21:09,614 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-31 17:21:09,616 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-31 17:21:09,617 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-31 17:21:09,625 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-31 17:21:09,655 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 [2019-01-31 17:21:09,671 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-31 17:21:09,671 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-31 17:21:09,672 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-31 17:21:09,672 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-31 17:21:09,673 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-31 17:21:09,673 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-31 17:21:09,673 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-31 17:21:09,673 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-31 17:21:09,673 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-31 17:21:09,674 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-31 17:21:09,676 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-31 17:21:09,677 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-31 17:21:09,677 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-31 17:21:09,678 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-31 17:21:09,678 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-31 17:21:09,678 INFO L133 SettingsManager]: * Use SBE=true [2019-01-31 17:21:09,678 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-31 17:21:09,679 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-31 17:21:09,680 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-31 17:21:09,681 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-31 17:21:09,681 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-31 17:21:09,681 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-31 17:21:09,681 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-31 17:21:09,681 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-31 17:21:09,681 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-31 17:21:09,682 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-31 17:21:09,682 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-31 17:21:09,683 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-31 17:21:09,683 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-31 17:21:09,683 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-31 17:21:09,683 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 17:21:09,683 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-31 17:21:09,684 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-31 17:21:09,686 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-31 17:21:09,686 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-31 17:21:09,686 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-31 17:21:09,686 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-01-31 17:21:09,686 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-31 17:21:09,687 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-31 17:21:09,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-31 17:21:09,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-31 17:21:09,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-31 17:21:09,735 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-31 17:21:09,736 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-31 17:21:09,737 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/mcmillan2006.c.i_3.bpl [2019-01-31 17:21:09,737 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/mcmillan2006.c.i_3.bpl' [2019-01-31 17:21:09,784 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-31 17:21:09,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-31 17:21:09,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-31 17:21:09,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-31 17:21:09,787 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-31 17:21:09,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-31 17:21:09,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-31 17:21:09,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-31 17:21:09,822 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-31 17:21:09,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/1) ... [2019-01-31 17:21:09,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-31 17:21:09,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-31 17:21:09,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-31 17:21:09,847 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-31 17:21:09,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (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:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 17:21:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-31 17:21:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-31 17:21:10,133 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-31 17:21:10,133 INFO L286 CfgBuilder]: Removed 2 assue(true) statements. [2019-01-31 17:21:10,135 INFO L202 PluginConnector]: Adding new model mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:21:10 BoogieIcfgContainer [2019-01-31 17:21:10,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-31 17:21:10,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-31 17:21:10,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-31 17:21:10,139 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-31 17:21:10,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:21:09" (1/2) ... [2019-01-31 17:21:10,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e009ef and model type mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:21:10, skipping insertion in model container [2019-01-31 17:21:10,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mcmillan2006.c.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:21:10" (2/2) ... [2019-01-31 17:21:10,142 INFO L112 eAbstractionObserver]: Analyzing ICFG mcmillan2006.c.i_3.bpl [2019-01-31 17:21:10,153 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-31 17:21:10,162 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-31 17:21:10,175 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-31 17:21:10,201 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-31 17:21:10,201 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-31 17:21:10,201 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-31 17:21:10,201 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-31 17:21:10,201 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-31 17:21:10,202 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-31 17:21:10,202 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-31 17:21:10,202 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-31 17:21:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-01-31 17:21:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:21:10,218 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:21:10,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:21:10,222 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:21:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:21:10,228 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2019-01-31 17:21:10,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:21:10,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:21:10,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:21:10,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:21:10,273 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:21:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:21:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:21:10,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-31 17:21:10,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-31 17:21:10,380 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:21:10,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-31 17:21:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-31 17:21:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:21:10,400 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-01-31 17:21:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:21:10,439 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-01-31 17:21:10,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 17:21:10,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-31 17:21:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:21:10,454 INFO L225 Difference]: With dead ends: 9 [2019-01-31 17:21:10,454 INFO L226 Difference]: Without dead ends: 5 [2019-01-31 17:21:10,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:21:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-01-31 17:21:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-01-31 17:21:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-01-31 17:21:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-01-31 17:21:10,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-01-31 17:21:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:21:10,512 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-01-31 17:21:10,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-31 17:21:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-01-31 17:21:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:21:10,514 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:21:10,514 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:21:10,514 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:21:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:21:10,515 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2019-01-31 17:21:10,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:21:10,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:21:10,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:21:10,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:21:10,517 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:21:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:21:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:21:10,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:21:10,766 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:21:10,767 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:21:10,770 INFO L207 CegarAbsIntRunner]: [0], [5], [7], [9] [2019-01-31 17:21:10,832 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-31 17:21:10,832 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:21:14,577 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.handleInfeasibleCase(BaseRefinementStrategy.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:206) 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: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.util.datastructures.UnionFind.union(UnionFind.java:445) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.SegmentationMap.move(SegmentationMap.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.addEquivalence(ArrayDomainState.java:736) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.unify(ArrayDomainState.java:562) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.isSubsetOf(ArrayDomainState.java:950) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.isSubsetOf(ArrayDomainState.java:1) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.getMaximalElements(DisjunctiveAbstractState.java:571) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.reduce(DisjunctiveAbstractState.java:548) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:521) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.constructInterpolantGenerator(BaseTaipanRefinementStrategy.java:382) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getInterpolantGenerator(BaseTaipanRefinementStrategy.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:380) ... 20 more [2019-01-31 17:21:14,584 INFO L168 Benchmark]: Toolchain (without parser) took 4796.88 ms. Allocated memory was 138.4 MB in the beginning and 466.6 MB in the end (delta: 328.2 MB). Free memory was 105.4 MB in the beginning and 101.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 378.1 MB. Max. memory is 7.1 GB. [2019-01-31 17:21:14,587 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory is still 106.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-31 17:21:14,588 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.52 ms. Allocated memory is still 138.4 MB. Free memory was 105.4 MB in the beginning and 103.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-01-31 17:21:14,591 INFO L168 Benchmark]: Boogie Preprocessor took 24.65 ms. Allocated memory is still 138.4 MB. Free memory was 103.7 MB in the beginning and 102.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-31 17:21:14,592 INFO L168 Benchmark]: RCFGBuilder took 288.57 ms. Allocated memory is still 138.4 MB. Free memory was 102.5 MB in the beginning and 91.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-01-31 17:21:14,593 INFO L168 Benchmark]: TraceAbstraction took 4445.59 ms. Allocated memory was 138.4 MB in the beginning and 466.6 MB in the end (delta: 328.2 MB). Free memory was 91.2 MB in the beginning and 101.7 MB in the end (delta: -10.5 MB). Peak memory consumption was 363.9 MB. Max. memory is 7.1 GB. [2019-01-31 17:21:14,604 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory is still 106.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.52 ms. Allocated memory is still 138.4 MB. Free memory was 105.4 MB in the beginning and 103.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.65 ms. Allocated memory is still 138.4 MB. Free memory was 103.7 MB in the beginning and 102.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.57 ms. Allocated memory is still 138.4 MB. Free memory was 102.5 MB in the beginning and 91.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4445.59 ms. Allocated memory was 138.4 MB in the beginning and 466.6 MB in the end (delta: 328.2 MB). Free memory was 91.2 MB in the beginning and 101.7 MB in the end (delta: -10.5 MB). Peak memory consumption was 363.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.NullPointerException de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.NullPointerException: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...