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 0.1.24-1de736e-m [2019-02-15 11:11:32,235 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-15 11:11:32,240 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-15 11:11:32,265 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-15 11:11:32,265 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-15 11:11:32,266 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-15 11:11:32,268 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-15 11:11:32,271 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-15 11:11:32,273 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-15 11:11:32,274 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-15 11:11:32,275 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-02-15 11:11:32,303 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-02-15 11:11:32,321 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-15 11:11:32,322 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-15 11:11:32,323 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-15 11:11:32,323 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-15 11:11:32,323 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-15 11:11:32,323 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-15 11:11:32,324 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-15 11:11:32,324 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-15 11:11:32,324 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-15 11:11:32,324 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-02-15 11:11:32,324 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-02-15 11:11:32,325 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-15 11:11:32,325 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-15 11:11:32,326 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-15 11:11:32,326 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-15 11:11:32,326 INFO L133 SettingsManager]: * Use SBE=true [2019-02-15 11:11:32,327 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-15 11:11:32,327 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-15 11:11:32,327 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-15 11:11:32,327 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-15 11:11:32,327 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-15 11:11:32,328 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-15 11:11:32,328 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-15 11:11:32,328 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-15 11:11:32,328 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-15 11:11:32,328 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-15 11:11:32,329 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-15 11:11:32,329 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-15 11:11:32,329 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-15 11:11:32,329 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-15 11:11:32,330 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-02-15 11:11:32,330 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-15 11:11:32,330 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-15 11:11:32,330 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-15 11:11:32,331 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-15 11:11:32,331 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-15 11:11:32,331 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-02-15 11:11:32,331 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-15 11:11:32,331 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-15 11:11:32,376 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-15 11:11:32,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-15 11:11:32,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-15 11:11:32,402 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-15 11:11:32,402 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-15 11:11:32,403 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/matrix.i_4.bpl [2019-02-15 11:11:32,403 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/matrix.i_4.bpl' [2019-02-15 11:11:32,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-15 11:11:32,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-15 11:11:32,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-15 11:11:32,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-15 11:11:32,470 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-15 11:11:32,492 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 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,505 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 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-15 11:11:32,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-15 11:11:32,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-15 11:11:32,519 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-15 11:11:32,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/1) ... [2019-02-15 11:11:32,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-15 11:11:32,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-15 11:11:32,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-15 11:11:32,548 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-15 11:11:32,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (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 [2019-02-15 11:11:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-15 11:11:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-15 11:11:32,852 INFO L695 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2019-02-15 11:11:32,854 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-15 11:11:32,854 INFO L286 CfgBuilder]: Removed 2 assue(true) statements. [2019-02-15 11:11:32,856 INFO L202 PluginConnector]: Adding new model matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:11:32 BoogieIcfgContainer [2019-02-15 11:11:32,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-15 11:11:32,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-15 11:11:32,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-15 11:11:32,861 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-15 11:11:32,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:11:32" (1/2) ... [2019-02-15 11:11:32,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492d857 and model type matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:11:32, skipping insertion in model container [2019-02-15 11:11:32,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "matrix.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:11:32" (2/2) ... [2019-02-15 11:11:32,865 INFO L112 eAbstractionObserver]: Analyzing ICFG matrix.i_4.bpl [2019-02-15 11:11:32,876 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-15 11:11:32,885 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-02-15 11:11:32,904 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-02-15 11:11:32,941 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-15 11:11:32,942 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-15 11:11:32,942 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-15 11:11:32,942 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-15 11:11:32,942 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-15 11:11:32,943 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-15 11:11:32,943 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-15 11:11:32,943 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-15 11:11:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-02-15 11:11:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:11:32,970 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:11:32,971 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:11:32,974 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:11:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:11:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2019-02-15 11:11:32,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:11:33,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:11:33,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:11:33,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:11:33,042 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:11:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:11:33,359 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 10 [2019-02-15 11:11:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:11:33,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-15 11:11:33,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-02-15 11:11:33,366 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:11:33,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-15 11:11:33,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-15 11:11:33,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 11:11:33,391 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-02-15 11:11:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:11:33,446 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2019-02-15 11:11:33,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 11:11:33,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-15 11:11:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:11:33,463 INFO L225 Difference]: With dead ends: 11 [2019-02-15 11:11:33,463 INFO L226 Difference]: Without dead ends: 7 [2019-02-15 11:11:33,467 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 [2019-02-15 11:11:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-02-15 11:11:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2019-02-15 11:11:33,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-02-15 11:11:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-02-15 11:11:33,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2019-02-15 11:11:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:11:33,503 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-02-15 11:11:33,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-15 11:11:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2019-02-15 11:11:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 11:11:33,504 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:11:33,504 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 11:11:33,504 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:11:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:11:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash 28852267, now seen corresponding path program 1 times [2019-02-15 11:11:33,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:11:33,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:11:33,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:11:33,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:11:33,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:11:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:11:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:11:33,742 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-15 11:11:33,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-02-15 11:11:33,743 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:11:33,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-15 11:11:33,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-15 11:11:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-02-15 11:11:33,746 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2019-02-15 11:11:33,927 WARN L181 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-02-15 11:11:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:11:34,005 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2019-02-15 11:11:34,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-15 11:11:34,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-02-15 11:11:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:11:34,008 INFO L225 Difference]: With dead ends: 11 [2019-02-15 11:11:34,008 INFO L226 Difference]: Without dead ends: 7 [2019-02-15 11:11:34,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-02-15 11:11:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-02-15 11:11:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-02-15 11:11:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-02-15 11:11:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-02-15 11:11:34,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2019-02-15 11:11:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:11:34,016 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-02-15 11:11:34,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-15 11:11:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-02-15 11:11:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-15 11:11:34,032 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:11:34,032 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-15 11:11:34,033 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:11:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:11:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash 894489354, now seen corresponding path program 1 times [2019-02-15 11:11:34,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:11:34,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:11:34,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:11:34,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:11:34,038 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:11:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:11:34,366 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2019-02-15 11:11:34,681 WARN L181 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2019-02-15 11:11:34,923 WARN L181 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2019-02-15 11:11:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:11:34,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:11:34,960 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:11:34,962 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-15 11:11:34,964 INFO L207 CegarAbsIntRunner]: [0], [5], [7], [9], [15], [17] [2019-02-15 11:11:35,040 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:11:35,041 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:11:35,128 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-02-15 11:11:42,680 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:563) 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 [2019-02-15 11:11:42,685 INFO L168 Benchmark]: Toolchain (without parser) took 10217.24 ms. Allocated memory was 141.6 MB in the beginning and 634.9 MB in the end (delta: 493.4 MB). Free memory was 108.8 MB in the beginning and 322.5 MB in the end (delta: -213.7 MB). Peak memory consumption was 279.7 MB. Max. memory is 7.1 GB. [2019-02-15 11:11:42,687 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-15 11:11:42,688 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.96 ms. Allocated memory is still 141.6 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-02-15 11:11:42,689 INFO L168 Benchmark]: Boogie Preprocessor took 28.74 ms. Allocated memory is still 141.6 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-02-15 11:11:42,690 INFO L168 Benchmark]: RCFGBuilder took 308.65 ms. Allocated memory is still 141.6 MB. Free memory was 106.0 MB in the beginning and 96.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-02-15 11:11:42,692 INFO L168 Benchmark]: TraceAbstraction took 9826.93 ms. Allocated memory was 141.6 MB in the beginning and 634.9 MB in the end (delta: 493.4 MB). Free memory was 95.6 MB in the beginning and 322.5 MB in the end (delta: -226.8 MB). Peak memory consumption was 266.5 MB. Max. memory is 7.1 GB. [2019-02-15 11:11:42,697 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 141.6 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.96 ms. Allocated memory is still 141.6 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.74 ms. Allocated memory is still 141.6 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.65 ms. Allocated memory is still 141.6 MB. Free memory was 106.0 MB in the beginning and 96.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9826.93 ms. Allocated memory was 141.6 MB in the beginning and 634.9 MB in the end (delta: 493.4 MB). Free memory was 95.6 MB in the beginning and 322.5 MB in the end (delta: -226.8 MB). Peak memory consumption was 266.5 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...