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_oct_cong.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/linear_search.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 17:45:14,276 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 17:45:14,278 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 17:45:14,298 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-03 17:45:14,365 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_oct_cong.epf [2018-12-03 17:45:14,387 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 17:45:14,388 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 17:45:14,389 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 17:45:14,389 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 17:45:14,390 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 17:45:14,390 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 17:45:14,390 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 17:45:14,390 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 17:45:14,390 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 17:45:14,391 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 17:45:14,391 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 17:45:14,392 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 17:45:14,392 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 17:45:14,393 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 17:45:14,393 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 17:45:14,393 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 17:45:14,393 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 17:45:14,393 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 17:45:14,395 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 17:45:14,395 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 17:45:14,396 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 17:45:14,396 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 17:45:14,396 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 17:45:14,396 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 17:45:14,397 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 17:45:14,397 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 17:45:14,397 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 17:45:14,397 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 17:45:14,397 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 17:45:14,398 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 17:45:14,398 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 17:45:14,398 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 17:45:14,398 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 17:45:14,398 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 17:45:14,399 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 17:45:14,399 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 17:45:14,399 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 17:45:14,399 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 17:45:14,400 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 17:45:14,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 17:45:14,468 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 17:45:14,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 17:45:14,475 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 17:45:14,477 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 17:45:14,478 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/linear_search.i_5.bpl [2018-12-03 17:45:14,479 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/linear_search.i_5.bpl' [2018-12-03 17:45:14,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 17:45:14,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 17:45:14,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 17:45:14,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 17:45:14,548 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 17:45:14,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 17:45:14,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 17:45:14,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 17:45:14,590 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 17:45:14,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/1) ... [2018-12-03 17:45:14,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 17:45:14,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 17:45:14,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 17:45:14,625 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 17:45:14,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (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 17:45:14,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 17:45:14,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 17:45:14,930 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 17:45:14,930 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 17:45:14,931 INFO L202 PluginConnector]: Adding new model linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:45:14 BoogieIcfgContainer [2018-12-03 17:45:14,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 17:45:14,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 17:45:14,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 17:45:14,936 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 17:45:14,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 05:45:14" (1/2) ... [2018-12-03 17:45:14,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92834e and model type linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:45:14, skipping insertion in model container [2018-12-03 17:45:14,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "linear_search.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:45:14" (2/2) ... [2018-12-03 17:45:14,939 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search.i_5.bpl [2018-12-03 17:45:14,950 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 17:45:14,957 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 17:45:14,971 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 17:45:15,002 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 17:45:15,003 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 17:45:15,003 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 17:45:15,003 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 17:45:15,003 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 17:45:15,003 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 17:45:15,004 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 17:45:15,004 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 17:45:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-12-03 17:45:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 17:45:15,026 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:45:15,027 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 17:45:15,029 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:45:15,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:45:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-12-03 17:45:15,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:45:15,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:15,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:45:15,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:15,083 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:45:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:45:15,703 WARN L180 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2018-12-03 17:45:15,800 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 17:45:15,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 17:45:15,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 17:45:15,803 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 17:45:15,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 17:45:15,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 17:45:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 17:45:15,826 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-12-03 17:45:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 17:45:15,932 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-12-03 17:45:15,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 17:45:15,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-03 17:45:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 17:45:15,945 INFO L225 Difference]: With dead ends: 11 [2018-12-03 17:45:15,946 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 17:45:15,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-03 17:45:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 17:45:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 17:45:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 17:45:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 17:45:15,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-12-03 17:45:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 17:45:15,987 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 17:45:15,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 17:45:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 17:45:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 17:45:15,988 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 17:45:15,989 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-03 17:45:15,989 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 17:45:15,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 17:45:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-12-03 17:45:15,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 17:45:15,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:15,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 17:45:15,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 17:45:15,991 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 17:45:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 17:45:16,550 WARN L180 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2018-12-03 17:45:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 17:45:16,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 17:45:16,672 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 17:45:16,673 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-03 17:45:16,675 INFO L205 CegarAbsIntRunner]: [0], [2], [6], [8], [10] [2018-12-03 17:45:16,748 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 17:45:16,748 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 17:45:17,193 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.