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/matrix.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 14:13:40,649 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 14:13:40,651 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 14:13:40,668 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 14:13:40,668 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 14:13:40,669 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 14:13:40,671 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 14:13:40,673 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 14:13:40,675 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 14:13:40,676 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 14:13:40,677 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-24 14:13:40,677 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-24 14:13:40,678 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-24 14:13:40,679 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-24 14:13:40,681 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-24 14:13:40,681 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-24 14:13:40,682 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-24 14:13:40,685 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-24 14:13:40,687 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-24 14:13:40,689 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-24 14:13:40,690 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-24 14:13:40,692 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-24 14:13:40,695 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-24 14:13:40,695 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-24 14:13:40,695 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-24 14:13:40,696 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-24 14:13:40,698 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-24 14:13:40,698 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-24 14:13:40,699 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-24 14:13:40,703 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-24 14:13:40,703 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-24 14:13:40,704 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-24 14:13:40,705 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-24 14:13:40,705 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-24 14:13:40,711 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-24 14:13:40,712 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-24 14:13:40,713 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 [2018-12-24 14:13:40,736 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 14:13:40,736 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 14:13:40,737 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 14:13:40,737 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 14:13:40,738 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 14:13:40,738 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 14:13:40,738 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 14:13:40,738 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 14:13:40,739 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 14:13:40,739 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-24 14:13:40,739 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-24 14:13:40,739 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 14:13:40,739 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 14:13:40,743 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 14:13:40,743 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 14:13:40,743 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 14:13:40,743 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 14:13:40,744 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 14:13:40,744 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 14:13:40,744 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 14:13:40,744 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 14:13:40,744 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 14:13:40,745 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 14:13:40,746 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 14:13:40,747 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 14:13:40,747 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 14:13:40,747 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 14:13:40,747 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 14:13:40,748 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 14:13:40,748 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 14:13:40,748 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:13:40,748 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 14:13:40,748 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 14:13:40,749 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 14:13:40,749 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 14:13:40,750 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 14:13:40,750 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 14:13:40,750 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 14:13:40,750 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 14:13:40,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 14:13:40,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 14:13:40,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 14:13:40,813 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 14:13:40,814 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 14:13:40,815 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/matrix.i_4.bpl [2018-12-24 14:13:40,816 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/matrix.i_4.bpl' [2018-12-24 14:13:40,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 14:13:40,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 14:13:40,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 14:13:40,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 14:13:40,873 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 14:13:40,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 14:13:40,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 14:13:40,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 14:13:40,926 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 14:13:40,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/1) ... [2018-12-24 14:13:40,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 14:13:40,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 14:13:40,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 14:13:40,958 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 14:13:40,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (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 [2018-12-24 14:13:41,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 14:13:41,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 14:13:41,278 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 14:13:41,278 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-24 14:13:41,279 INFO L202 PluginConnector]: Adding new model matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:13:41 BoogieIcfgContainer [2018-12-24 14:13:41,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 14:13:41,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 14:13:41,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 14:13:41,285 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 14:13:41,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:13:40" (1/2) ... [2018-12-24 14:13:41,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689d6649 and model type matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 02:13:41, skipping insertion in model container [2018-12-24 14:13:41,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:13:41" (2/2) ... [2018-12-24 14:13:41,289 INFO L112 eAbstractionObserver]: Analyzing ICFG matrix.i_4.bpl [2018-12-24 14:13:41,301 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 14:13:41,310 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-24 14:13:41,331 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-24 14:13:41,372 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 14:13:41,373 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 14:13:41,373 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 14:13:41,373 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 14:13:41,373 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 14:13:41,374 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 14:13:41,374 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 14:13:41,374 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 14:13:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-12-24 14:13:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:13:41,400 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:13:41,402 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:13:41,405 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:13:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:13:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-24 14:13:41,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:13:41,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:41,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:13:41,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:41,469 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:13:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:13:41,820 WARN L181 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 10 [2018-12-24 14:13:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:41,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:13:41,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:13:41,827 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:13:41,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:13:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:13:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:13:41,854 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-12-24 14:13:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:13:41,934 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-12-24 14:13:41,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:13:41,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-24 14:13:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:13:41,949 INFO L225 Difference]: With dead ends: 11 [2018-12-24 14:13:41,949 INFO L226 Difference]: Without dead ends: 7 [2018-12-24 14:13:41,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:13:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-24 14:13:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-12-24 14:13:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-24 14:13:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-12-24 14:13:41,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-12-24 14:13:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:13:41,991 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-12-24 14:13:41,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:13:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-12-24 14:13:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:13:41,992 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:13:41,992 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:13:41,993 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:13:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:13:41,993 INFO L82 PathProgramCache]: Analyzing trace with hash 28852267, now seen corresponding path program 1 times [2018-12-24 14:13:41,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:13:41,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:41,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:13:41,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:41,995 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:13:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:13:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:42,190 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:13:42,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-24 14:13:42,190 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:13:42,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:13:42,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:13:42,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:13:42,193 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-12-24 14:13:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:13:42,301 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-12-24 14:13:42,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:13:42,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-24 14:13:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:13:42,303 INFO L225 Difference]: With dead ends: 11 [2018-12-24 14:13:42,303 INFO L226 Difference]: Without dead ends: 7 [2018-12-24 14:13:42,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:13:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-24 14:13:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-24 14:13:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-24 14:13:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-12-24 14:13:42,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-12-24 14:13:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:13:42,310 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-12-24 14:13:42,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:13:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-12-24 14:13:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:13:42,311 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:13:42,311 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:13:42,312 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:13:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:13:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash 894489354, now seen corresponding path program 1 times [2018-12-24 14:13:42,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:13:42,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:42,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:13:42,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:13:42,314 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:13:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:13:42,670 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2018-12-24 14:13:42,965 WARN L181 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2018-12-24 14:13:43,274 WARN L181 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2018-12-24 14:13:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:13:43,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:13:43,355 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:13:43,356 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:13:43,359 INFO L207 CegarAbsIntRunner]: [0], [5], [7], [9], [15], [17] [2018-12-24 14:13:43,438 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:13:43,439 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:13:43,542 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-12-24 14:13:43,716 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.plugins.analysis.abstractinterpretationv2.domain.relational.octagon.OctDomainState.evaluate(OctDomainState.java:1180) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.relational.octagon.OctPostOperator.evaluate(OctPostOperator.java:350) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.relational.octagon.OctPostOperator.evaluate(OctPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainToolkit.evaluate(ArrayDomainToolkit.java:168) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.isTrueInSubstate(ArrayDomainState.java:1305) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.getContainedBoundIndices(ArrayDomainState.java:1181) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainExpressionProcessor.processTerm(ArrayDomainExpressionProcessor.java:51) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainExpressionProcessor.processAssumeTerm(ArrayDomainExpressionProcessor.java:189) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainExpressionProcessor.processAssume(ArrayDomainExpressionProcessor.java:98) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainStatementProcessor.processAssume(ArrayDomainStatementProcessor.java:62) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainStatementProcessor.process(ArrayDomainStatementProcessor.java:45) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainPostOperator.handleInternalTransition(ArrayDomainPostOperator.java:124) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainPostOperator.apply(ArrayDomainPostOperator.java:74) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainPostOperator.apply(ArrayDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) 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 [2018-12-24 14:13:43,725 INFO L168 Benchmark]: Toolchain (without parser) took 2854.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 116.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. [2018-12-24 14:13:43,726 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:13:43,727 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:13:43,728 INFO L168 Benchmark]: Boogie Preprocessor took 31.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:13:43,729 INFO L168 Benchmark]: RCFGBuilder took 322.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:13:43,730 INFO L168 Benchmark]: TraceAbstraction took 2440.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:13:43,735 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 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 322.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2440.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 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...