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_compound_exp_cong.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/vogal.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 16:48:10,075 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 16:48:10,077 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 16:48:10,095 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 16:48:10,095 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 16:48:10,096 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 16:48:10,101 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 16:48:10,103 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 16:48:10,105 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 16:48:10,106 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 16:48:10,107 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 16:48:10,107 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 16:48:10,108 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 16:48:10,109 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 16:48:10,110 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 16:48:10,111 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 16:48:10,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 16:48:10,114 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 16:48:10,116 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 16:48:10,118 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 16:48:10,119 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 16:48:10,120 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 16:48:10,122 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 16:48:10,123 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 16:48:10,123 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 16:48:10,124 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 16:48:10,125 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 16:48:10,125 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 16:48:10,126 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 16:48:10,127 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 16:48:10,128 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 16:48:10,128 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 16:48:10,129 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 16:48:10,129 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 16:48:10,130 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 16:48:10,131 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 16:48:10,131 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_exp_cong.epf [2018-12-03 16:48:10,155 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 16:48:10,155 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 16:48:10,156 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 16:48:10,156 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 16:48:10,156 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 16:48:10,157 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 16:48:10,157 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 16:48:10,157 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 16:48:10,157 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 16:48:10,158 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 16:48:10,158 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 16:48:10,158 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 16:48:10,158 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 16:48:10,158 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 16:48:10,159 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 16:48:10,159 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 16:48:10,159 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 16:48:10,160 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 16:48:10,160 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 16:48:10,160 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 16:48:10,160 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 16:48:10,160 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 16:48:10,161 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 16:48:10,161 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 16:48:10,161 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 16:48:10,161 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 16:48:10,161 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 16:48:10,162 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 16:48:10,162 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 16:48:10,162 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 16:48:10,162 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 16:48:10,162 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 16:48:10,163 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 16:48:10,163 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 16:48:10,163 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 16:48:10,163 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 16:48:10,164 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 16:48:10,164 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 16:48:10,164 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 16:48:10,164 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 16:48:10,164 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 16:48:10,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 16:48:10,213 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 16:48:10,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 16:48:10,218 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 16:48:10,219 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 16:48:10,220 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/vogal.i_5.bpl [2018-12-03 16:48:10,220 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/vogal.i_5.bpl' [2018-12-03 16:48:10,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 16:48:10,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 16:48:10,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 16:48:10,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 16:48:10,294 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 16:48:10,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 16:48:10,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 16:48:10,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 16:48:10,335 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 16:48:10,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/1) ... [2018-12-03 16:48:10,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 16:48:10,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 16:48:10,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 16:48:10,369 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 16:48:10,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (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 [2018-12-03 16:48:10,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 16:48:10,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 16:48:10,775 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 16:48:10,775 INFO L280 CfgBuilder]: Removed 5 assue(true) statements. [2018-12-03 16:48:10,776 INFO L202 PluginConnector]: Adding new model vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:48:10 BoogieIcfgContainer [2018-12-03 16:48:10,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 16:48:10,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 16:48:10,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 16:48:10,781 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 16:48:10,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 04:48:10" (1/2) ... [2018-12-03 16:48:10,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53808e3c and model type vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:48:10, skipping insertion in model container [2018-12-03 16:48:10,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "vogal.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:48:10" (2/2) ... [2018-12-03 16:48:10,785 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal.i_5.bpl [2018-12-03 16:48:10,807 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 16:48:10,818 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 16:48:10,848 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 16:48:10,927 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 16:48:10,927 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 16:48:10,927 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 16:48:10,927 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 16:48:10,927 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 16:48:10,928 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 16:48:10,928 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 16:48:10,928 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 16:48:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-12-03 16:48:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 16:48:10,953 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:48:10,954 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-03 16:48:10,957 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:48:10,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:48:10,962 INFO L82 PathProgramCache]: Analyzing trace with hash 28790250, now seen corresponding path program 1 times [2018-12-03 16:48:10,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:48:11,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:48:11,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:48:11,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:48:11,011 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:48:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:48:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:48:11,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 16:48:11,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 16:48:11,201 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:48:11,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 16:48:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 16:48:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 16:48:11,221 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-12-03 16:48:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 16:48:11,313 INFO L93 Difference]: Finished difference Result 17 states and 27 transitions. [2018-12-03 16:48:11,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:48:11,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-03 16:48:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 16:48:11,327 INFO L225 Difference]: With dead ends: 17 [2018-12-03 16:48:11,327 INFO L226 Difference]: Without dead ends: 12 [2018-12-03 16:48:11,331 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 [2018-12-03 16:48:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-03 16:48:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 8. [2018-12-03 16:48:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-03 16:48:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2018-12-03 16:48:11,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 11 transitions. Word has length 5 [2018-12-03 16:48:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 16:48:11,365 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 11 transitions. [2018-12-03 16:48:11,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 16:48:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 11 transitions. [2018-12-03 16:48:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 16:48:11,366 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 16:48:11,366 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-03 16:48:11,366 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 16:48:11,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:48:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash 894129427, now seen corresponding path program 1 times [2018-12-03 16:48:11,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 16:48:11,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:48:11,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 16:48:11,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 16:48:11,369 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 16:48:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 16:48:11,697 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-12-03 16:48:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 16:48:11,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 16:48:11,699 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 16:48:11,700 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-03 16:48:11,702 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [12], [19], [23] [2018-12-03 16:48:11,744 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 16:48:11,745 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 16:48:29,190 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 16:48:29,192 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 2 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 16:48:29,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 16:48:29,204 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 16:48:30,103 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 70.83% of their original sizes. [2018-12-03 16:48:30,103 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 16:48:30,200 INFO L418 sIntCurrentIteration]: We unified 5 AI predicates to 5 [2018-12-03 16:48:30,200 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 16:48:30,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 16:48:30,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2018-12-03 16:48:30,202 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 16:48:30,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 16:48:30,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 16:48:30,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 16:48:30,204 INFO L87 Difference]: Start difference. First operand 8 states and 11 transitions. Second operand 4 states. [2018-12-03 16:48:34,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 16:48:34,214 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalState.setValueInternally(NonrelationalState.java:347) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalState.intersect(NonrelationalState.java:825) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalState.intersect(NonrelationalState.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainState.lambda$9(CompoundDomainState.java:342) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainState.applyCasted(CompoundDomainState.java:403) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainState.intersect(CompoundDomainState.java:342) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainState.intersect(CompoundDomainState.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.intersect(ArrayDomainState.java:382) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.array.ArrayDomainState.intersect(ArrayDomainState.java:1) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$12(DisjunctiveAbstractState.java:262) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.crossProduct(DisjunctiveAbstractState.java:482) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.crossProduct(DisjunctiveAbstractState.java:500) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.intersect(DisjunctiveAbstractState.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner$AbsIntPredicateUnifier.lambda$3(CegarAbsIntRunner.java:709) at java.util.stream.ReduceOps$2ReducingSink.accept(ReduceOps.java:123) at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1553) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:479) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner$AbsIntPredicateUnifier.getOrConstructPredicateForConjunction(CegarAbsIntRunner.java:709) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:699) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-03 16:48:34,219 INFO L168 Benchmark]: Toolchain (without parser) took 23928.69 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 950.5 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -542.1 MB). Peak memory consumption was 408.4 MB. Max. memory is 7.1 GB. [2018-12-03 16:48:34,220 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:48:34,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:48:34,223 INFO L168 Benchmark]: Boogie Preprocessor took 33.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 16:48:34,224 INFO L168 Benchmark]: RCFGBuilder took 407.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 16:48:34,225 INFO L168 Benchmark]: TraceAbstraction took 23440.43 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 950.5 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -563.3 MB). Peak memory consumption was 387.3 MB. Max. memory is 7.1 GB. [2018-12-03 16:48:34,231 INFO L336 ainManager$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 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 42.25 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 33.62 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 407.02 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 23440.43 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 950.5 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -563.3 MB). Peak memory consumption was 387.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalState.setValueInternally(NonrelationalState.java:347) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...