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_compound_exp_cong.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/codeblockAssertOrder01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:57:23,739 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:57:23,741 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:57:23,756 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 15:57:23,756 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 15:57:23,760 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 15:57:23,762 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 15:57:23,765 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 15:57:23,767 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 15:57:23,768 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 15:57:23,771 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 15:57:23,809 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-03 15:57:23,833 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:57:23,833 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:57:23,834 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:57:23,834 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:57:23,835 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:57:23,835 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:57:23,835 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:57:23,835 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:57:23,835 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:57:23,836 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:57:23,836 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:57:23,836 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:57:23,836 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:57:23,836 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:57:23,837 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:57:23,838 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:57:23,838 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:57:23,838 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:57:23,838 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:57:23,840 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:57:23,840 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:57:23,841 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:57:23,841 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:57:23,841 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:57:23,841 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:57:23,841 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:57:23,842 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:57:23,842 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:57:23,842 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:57:23,842 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:57:23,842 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:57:23,843 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:57:23,843 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:57:23,843 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:57:23,843 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:57:23,843 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:57:23,844 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:57:23,844 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:57:23,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:57:23,844 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:57:23,845 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:57:23,893 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:57:23,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:57:23,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:57:23,914 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:57:23,914 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:57:23,915 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/codeblockAssertOrder01.bpl [2018-12-03 15:57:23,916 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/codeblockAssertOrder01.bpl' [2018-12-03 15:57:23,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:57:23,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:57:23,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:57:23,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:57:23,965 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:57:23,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:23,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,002 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 15:57:24,003 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 15:57:24,003 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 15:57:24,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:57:24,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:57:24,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:57:24,007 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:57:24,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/1) ... [2018-12-03 15:57:24,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:57:24,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:57:24,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:57:24,035 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:57:24,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (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 15:57:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 15:57:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 15:57:24,302 INFO L272 CfgBuilder]: Using library mode [2018-12-03 15:57:24,302 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 15:57:24,303 INFO L202 PluginConnector]: Adding new model codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:57:24 BoogieIcfgContainer [2018-12-03 15:57:24,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:57:24,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:57:24,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:57:24,310 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:57:24,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:57:23" (1/2) ... [2018-12-03 15:57:24,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2befe373 and model type codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:57:24, skipping insertion in model container [2018-12-03 15:57:24,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:57:24" (2/2) ... [2018-12-03 15:57:24,314 INFO L112 eAbstractionObserver]: Analyzing ICFG codeblockAssertOrder01.bpl [2018-12-03 15:57:24,324 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:57:24,335 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:57:24,355 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:57:24,400 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:57:24,401 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:57:24,401 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:57:24,401 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:57:24,401 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:57:24,402 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:57:24,402 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:57:24,402 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:57:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 15:57:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:57:24,426 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:57:24,427 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:57:24,430 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:57:24,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:57:24,436 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2018-12-03 15:57:24,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:57:24,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:57:24,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:57:24,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:57:24,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:57:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:57:24,584 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 15:57:24,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:57:24,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:57:24,586 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:57:24,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:57:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:57:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:57:24,606 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 15:57:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:57:24,657 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-03 15:57:24,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:57:24,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 15:57:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:57:24,673 INFO L225 Difference]: With dead ends: 11 [2018-12-03 15:57:24,674 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 15:57:24,677 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 15:57:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 15:57:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 15:57:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 15:57:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 15:57:24,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 15:57:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:57:24,719 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 15:57:24,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:57:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 15:57:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 15:57:24,720 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:57:24,720 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 15:57:24,720 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:57:24,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:57:24,721 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2018-12-03 15:57:24,721 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:57:24,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:57:24,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:57:24,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:57:24,723 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:57:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:57:24,843 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 15:57:24,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:57:24,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:57:24,845 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 15:57:24,854 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [7] [2018-12-03 15:57:24,919 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:57:24,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:57:26,184 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:57:26,186 INFO L272 AbstractInterpreter]: Visited 4 different actions 13 times. Merged at 3 different actions 6 times. Widened at 1 different actions 1 times. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-03 15:57:26,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:57:26,198 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:57:26,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:57:26,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:57:26,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:57:26,214 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:57:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:57:26,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:57:26,256 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 15:57:26,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:57:26,482 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 15:57:26,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:57:26,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-03 15:57:26,513 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:57:26,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 15:57:26,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 15:57:26,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 15:57:26,515 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-12-03 15:57:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:57:26,552 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-03 15:57:26,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 15:57:26,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-03 15:57:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:57:26,554 INFO L225 Difference]: With dead ends: 8 [2018-12-03 15:57:26,554 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 15:57:26,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 15:57:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 15:57:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 15:57:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 15:57:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 15:57:26,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 15:57:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:57:26,560 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 15:57:26,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 15:57:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 15:57:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 15:57:26,561 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:57:26,562 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-03 15:57:26,562 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:57:26,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:57:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash 28752352, now seen corresponding path program 2 times [2018-12-03 15:57:26,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:57:26,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:57:26,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:57:26,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:57:26,565 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:57:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:57:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:57:26,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:57:26,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:57:26,617 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:57:26,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:57:26,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:57:26,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:57:26,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:57:26,629 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:57:26,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-03 15:57:26,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:57:26,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:57:26,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-03 15:57:26,668 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 15:57:26,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 15:57:26,685 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:18 [2018-12-03 15:57:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 15:57:26,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:57:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 15:57:26,775 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 15:57:26,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 7 [2018-12-03 15:57:26,775 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:57:26,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:57:26,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:57:26,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-03 15:57:26,776 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 3 states. [2018-12-03 15:57:26,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:57:26,778 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-03 15:57:26,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:57:26,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-03 15:57:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:57:26,779 INFO L225 Difference]: With dead ends: 6 [2018-12-03 15:57:26,779 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 15:57:26,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-03 15:57:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 15:57:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 15:57:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 15:57:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 15:57:26,780 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2018-12-03 15:57:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:57:26,781 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 15:57:26,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:57:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 15:57:26,781 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 15:57:26,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 15:57:26,796 INFO L451 ceAbstractionStarter]: At program point L15-1(lines 15 17) the Hoare annotation is: true [2018-12-03 15:57:26,796 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 10 22) no Hoare annotation was computed. [2018-12-03 15:57:26,796 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-12-03 15:57:26,796 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-12-03 15:57:26,796 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-03 15:57:26,796 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 21) no Hoare annotation was computed. [2018-12-03 15:57:26,867 INFO L202 PluginConnector]: Adding new model codeblockAssertOrder01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:57:26 BoogieIcfgContainer [2018-12-03 15:57:26,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 15:57:26,869 INFO L168 Benchmark]: Toolchain (without parser) took 2906.24 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -725.5 MB). Peak memory consumption was 146.0 MB. Max. memory is 7.1 GB. [2018-12-03 15:57:26,873 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:57:26,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:57:26,874 INFO L168 Benchmark]: Boogie Preprocessor took 27.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:57:26,875 INFO L168 Benchmark]: RCFGBuilder took 268.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 15:57:26,875 INFO L168 Benchmark]: TraceAbstraction took 2562.72 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -759.4 MB). Peak memory consumption was 124.9 MB. Max. memory is 7.1 GB. [2018-12-03 15:57:26,882 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 268.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 2562.72 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -759.4 MB). Peak memory consumption was 124.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: true - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 2.4s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 8 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 3 NumberOfFragments, 1 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 21 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 23 ConstructedInterpolants, 1 QuantifiedInterpolants, 235 SizeOfPredicates, 5 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...