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-7-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-a9d37a5-m [2019-02-28 10:53:09,382 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-28 10:53:09,384 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-28 10:53:09,396 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-02-28 10:53:09,437 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 [2019-02-28 10:53:09,458 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-28 10:53:09,460 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-28 10:53:09,461 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-28 10:53:09,461 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-28 10:53:09,461 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-28 10:53:09,462 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-28 10:53:09,462 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-28 10:53:09,462 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-28 10:53:09,462 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-28 10:53:09,462 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-02-28 10:53:09,463 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-02-28 10:53:09,463 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-28 10:53:09,463 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-28 10:53:09,464 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-28 10:53:09,464 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-28 10:53:09,464 INFO L133 SettingsManager]: * Use SBE=true [2019-02-28 10:53:09,464 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-28 10:53:09,465 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-28 10:53:09,465 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-28 10:53:09,465 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-28 10:53:09,465 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-28 10:53:09,465 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-28 10:53:09,465 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-28 10:53:09,467 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-28 10:53:09,467 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-28 10:53:09,467 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-28 10:53:09,467 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-28 10:53:09,467 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-28 10:53:09,468 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-28 10:53:09,468 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-28 10:53:09,468 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:53:09,468 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-28 10:53:09,468 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-28 10:53:09,469 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-28 10:53:09,469 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-28 10:53:09,469 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-28 10:53:09,469 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in [2019-02-28 10:53:09,469 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-28 10:53:09,469 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-28 10:53:09,503 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-28 10:53:09,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-28 10:53:09,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-28 10:53:09,521 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-28 10:53:09,522 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-28 10:53:09,522 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2019-02-28 10:53:09,523 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2019-02-28 10:53:09,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-28 10:53:09,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-28 10:53:09,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-28 10:53:09,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-28 10:53:09,567 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-28 10:53:09,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-28 10:53:09,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-28 10:53:09,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-28 10:53:09,627 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-28 10:53:09,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... [2019-02-28 10:53:09,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-28 10:53:09,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-28 10:53:09,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-28 10:53:09,653 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-28 10:53:09,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:53:09,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-28 10:53:09,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-28 10:53:10,223 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-28 10:53:10,223 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-02-28 10:53:10,225 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:53:10 BoogieIcfgContainer [2019-02-28 10:53:10,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-28 10:53:10,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-28 10:53:10,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-28 10:53:10,231 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-28 10:53:10,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:53:09" (1/2) ... [2019-02-28 10:53:10,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ece7be3 and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.02 10:53:10, skipping insertion in model container [2019-02-28 10:53:10,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:53:10" (2/2) ... [2019-02-28 10:53:10,237 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2019-02-28 10:53:10,244 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-28 10:53:10,252 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-02-28 10:53:10,264 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-02-28 10:53:10,294 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-28 10:53:10,294 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-28 10:53:10,295 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-28 10:53:10,295 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-28 10:53:10,295 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-28 10:53:10,295 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-28 10:53:10,295 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-28 10:53:10,295 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-28 10:53:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-02-28 10:53:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-28 10:53:10,315 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:53:10,316 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-28 10:53:10,318 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:53:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:53:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-02-28 10:53:10,325 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:53:10,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:53:10,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:53:10,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:53:10,369 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:53:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:53:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:53:10,517 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:53:10,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-28 10:53:10,517 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:53:10,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-28 10:53:10,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-28 10:53:10,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:53:10,539 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-02-28 10:53:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:53:10,809 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-02-28 10:53:10,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:53:10,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-28 10:53:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:53:10,826 INFO L225 Difference]: With dead ends: 33 [2019-02-28 10:53:10,826 INFO L226 Difference]: Without dead ends: 28 [2019-02-28 10:53:10,829 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 [2019-02-28 10:53:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-02-28 10:53:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-02-28 10:53:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-02-28 10:53:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-02-28 10:53:10,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-02-28 10:53:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:53:10,866 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-02-28 10:53:10,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-28 10:53:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-02-28 10:53:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:53:10,867 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:53:10,867 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:53:10,868 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:53:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:53:10,868 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-02-28 10:53:10,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:53:10,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:53:10,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:53:10,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:53:10,870 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:53:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:53:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:53:10,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:53:10,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-28 10:53:10,921 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:53:10,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-28 10:53:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-28 10:53:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:53:10,924 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-02-28 10:53:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:53:11,129 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-02-28 10:53:11,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:53:11,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-28 10:53:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:53:11,131 INFO L225 Difference]: With dead ends: 28 [2019-02-28 10:53:11,131 INFO L226 Difference]: Without dead ends: 27 [2019-02-28 10:53:11,132 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 [2019-02-28 10:53:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-02-28 10:53:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-02-28 10:53:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-02-28 10:53:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-02-28 10:53:11,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-02-28 10:53:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:53:11,137 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-02-28 10:53:11,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-28 10:53:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-02-28 10:53:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:53:11,138 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:53:11,139 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:53:11,139 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:53:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:53:11,140 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-02-28 10:53:11,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:53:11,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:53:11,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:53:11,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:53:11,141 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:53:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:53:11,388 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-02-28 10:53:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:53:11,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:53:11,401 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:53:11,402 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:53:11,403 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-02-28 10:53:11,456 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-28 10:53:11,456 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:53:26,130 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-02-28 10:53:26,132 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. [2019-02-28 10:53:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:53:26,137 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-02-28 10:53:26,929 INFO L418 sIntCurrentIteration]: Unifying AI predicates