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/heapseparator/speedup-poc-dd-8-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1ae3202 [2019-03-04 16:55:11,064 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-03-04 16:55:11,067 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-03-04 16:55:11,082 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-03-04 16:55:11,082 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-03-04 16:55:11,083 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-03-04 16:55:11,084 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-03-04 16:55:11,086 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-03-04 16:55:11,088 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-03-04 16:55:11,089 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-03-04 16:55:11,090 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-03-04 16:55:11,090 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-03-04 16:55:11,091 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-03-04 16:55:11,092 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-03-04 16:55:11,093 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-03-04 16:55:11,094 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-03-04 16:55:11,094 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-03-04 16:55:11,096 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-03-04 16:55:11,098 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-03-04 16:55:11,100 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-03-04 16:55:11,101 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-03-04 16:55:11,102 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-03-04 16:55:11,105 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-03-04 16:55:11,105 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-03-04 16:55:11,105 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-03-04 16:55:11,106 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-03-04 16:55:11,107 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-03-04 16:55:11,108 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-03-04 16:55:11,109 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-03-04 16:55:11,110 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-03-04 16:55:11,110 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-03-04 16:55:11,111 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-03-04 16:55:11,111 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-03-04 16:55:11,111 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-03-04 16:55:11,112 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-03-04 16:55:11,113 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-03-04 16:55:11,113 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 [2019-03-04 16:55:11,128 INFO L110 SettingsManager]: Loading preferences was successful [2019-03-04 16:55:11,128 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-03-04 16:55:11,129 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-03-04 16:55:11,129 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-03-04 16:55:11,129 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-03-04 16:55:11,130 INFO L133 SettingsManager]: * User list type=DISABLED [2019-03-04 16:55:11,130 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-03-04 16:55:11,130 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-03-04 16:55:11,130 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-03-04 16:55:11,130 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-03-04 16:55:11,131 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-03-04 16:55:11,131 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-03-04 16:55:11,131 INFO L133 SettingsManager]: * Interval Domain=false [2019-03-04 16:55:11,132 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-03-04 16:55:11,132 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-03-04 16:55:11,132 INFO L133 SettingsManager]: * Use SBE=true [2019-03-04 16:55:11,132 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-03-04 16:55:11,132 INFO L133 SettingsManager]: * sizeof long=4 [2019-03-04 16:55:11,133 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-03-04 16:55:11,133 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-03-04 16:55:11,133 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-03-04 16:55:11,133 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-03-04 16:55:11,133 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-03-04 16:55:11,133 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-03-04 16:55:11,134 INFO L133 SettingsManager]: * sizeof long double=12 [2019-03-04 16:55:11,134 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-03-04 16:55:11,134 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-03-04 16:55:11,134 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-03-04 16:55:11,134 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-03-04 16:55:11,135 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-03-04 16:55:11,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-03-04 16:55:11,135 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-03-04 16:55:11,135 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-03-04 16:55:11,135 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-03-04 16:55:11,136 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-03-04 16:55:11,136 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-03-04 16:55:11,136 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-03-04 16:55:11,136 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-03-04 16:55:11,136 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-03-04 16:55:11,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-03-04 16:55:11,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-03-04 16:55:11,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-03-04 16:55:11,182 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-03-04 16:55:11,183 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-03-04 16:55:11,183 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-limited.bpl [2019-03-04 16:55:11,184 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-limited.bpl' [2019-03-04 16:55:11,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-03-04 16:55:11,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-03-04 16:55:11,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-03-04 16:55:11,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-03-04 16:55:11,225 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-03-04 16:55:11,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-03-04 16:55:11,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-03-04 16:55:11,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-03-04 16:55:11,290 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-03-04 16:55:11,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/1) ... [2019-03-04 16:55:11,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-03-04 16:55:11,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-03-04 16:55:11,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-03-04 16:55:11,339 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-03-04 16:55:11,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (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 [2019-03-04 16:55:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-03-04 16:55:11,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-03-04 16:55:11,911 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-03-04 16:55:11,911 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-03-04 16:55:11,913 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 04:55:11 BoogieIcfgContainer [2019-03-04 16:55:11,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-03-04 16:55:11,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-03-04 16:55:11,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-03-04 16:55:11,923 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-03-04 16:55:11,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:55:11" (1/2) ... [2019-03-04 16:55:11,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b5334a and model type speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 04:55:11, skipping insertion in model container [2019-03-04 16:55:11,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 04:55:11" (2/2) ... [2019-03-04 16:55:11,929 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-limited.bpl [2019-03-04 16:55:11,948 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-03-04 16:55:11,966 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-03-04 16:55:12,002 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-03-04 16:55:12,074 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-03-04 16:55:12,074 INFO L383 AbstractCegarLoop]: Hoare is true [2019-03-04 16:55:12,074 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-03-04 16:55:12,075 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-03-04 16:55:12,075 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-03-04 16:55:12,075 INFO L387 AbstractCegarLoop]: Difference is false [2019-03-04 16:55:12,075 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-03-04 16:55:12,075 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-03-04 16:55:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-03-04 16:55:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-03-04 16:55:12,116 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:55:12,117 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-03-04 16:55:12,120 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:55:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:55:12,127 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-03-04 16:55:12,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:55:12,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:55:12,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:55:12,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:55:12,183 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:55:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:55:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:55:12,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-03-04 16:55:12,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-03-04 16:55:12,337 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:55:12,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-03-04 16:55:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-03-04 16:55:12,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:55:12,355 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-03-04 16:55:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:55:12,575 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-03-04 16:55:12,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-03-04 16:55:12,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-03-04 16:55:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:55:12,600 INFO L225 Difference]: With dead ends: 37 [2019-03-04 16:55:12,601 INFO L226 Difference]: Without dead ends: 32 [2019-03-04 16:55:12,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:55:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-03-04 16:55:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-03-04 16:55:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-03-04 16:55:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-03-04 16:55:12,642 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-03-04 16:55:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:55:12,644 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-03-04 16:55:12,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-03-04 16:55:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-03-04 16:55:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:55:12,645 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:55:12,645 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:55:12,646 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:55:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:55:12,647 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-03-04 16:55:12,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:55:12,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:55:12,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:55:12,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:55:12,648 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:55:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:55:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:55:12,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:55:12,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:55:12,864 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:55:12,865 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-03-04 16:55:12,923 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-03-04 16:55:12,923 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:55:32,831 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-03-04 16:55:32,833 INFO L272 AbstractInterpreter]: Visited 3 different actions 13 times. Merged at 1 different actions 5 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-03-04 16:55:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:55:32,839 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates