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/20170304-DifficultPathPrograms/sum04.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 15:43:09,652 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 15:43:09,654 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 15:43:09,666 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-03 15:43:09,718 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 15:43:09,732 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 15:43:09,732 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 15:43:09,733 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 15:43:09,733 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 15:43:09,733 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 15:43:09,734 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 15:43:09,734 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 15:43:09,734 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 15:43:09,734 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 15:43:09,734 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 15:43:09,735 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 15:43:09,735 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 15:43:09,735 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 15:43:09,735 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 15:43:09,735 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 15:43:09,736 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 15:43:09,736 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 15:43:09,737 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 15:43:09,737 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 15:43:09,737 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 15:43:09,737 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 15:43:09,737 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 15:43:09,738 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 15:43:09,738 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 15:43:09,738 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 15:43:09,738 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 15:43:09,738 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 15:43:09,739 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 15:43:09,739 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 15:43:09,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 15:43:09,739 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 15:43:09,739 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 15:43:09,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 15:43:09,741 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 15:43:09,741 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 15:43:09,741 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 15:43:09,741 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 15:43:09,741 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 15:43:09,742 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 15:43:09,742 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 15:43:09,743 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 15:43:09,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 15:43:09,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 15:43:09,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 15:43:09,817 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 15:43:09,817 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 15:43:09,818 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum04.i_3.bpl [2018-12-03 15:43:09,818 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum04.i_3.bpl' [2018-12-03 15:43:09,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 15:43:09,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 15:43:09,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 15:43:09,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 15:43:09,862 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 15:43:09,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 15:43:09,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 15:43:09,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 15:43:09,898 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 15:43:09,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/1) ... [2018-12-03 15:43:09,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 15:43:09,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 15:43:09,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 15:43:09,919 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 15:43:09,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (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: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 15:43:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 15:43:09,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 15:43:10,238 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 15:43:10,239 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 15:43:10,239 INFO L202 PluginConnector]: Adding new model sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:43:10 BoogieIcfgContainer [2018-12-03 15:43:10,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 15:43:10,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 15:43:10,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 15:43:10,244 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 15:43:10,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 03:43:09" (1/2) ... [2018-12-03 15:43:10,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a96160 and model type sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:43:10, skipping insertion in model container [2018-12-03 15:43:10,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:43:10" (2/2) ... [2018-12-03 15:43:10,248 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04.i_3.bpl [2018-12-03 15:43:10,259 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 15:43:10,266 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 15:43:10,280 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 15:43:10,311 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 15:43:10,311 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 15:43:10,312 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 15:43:10,312 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 15:43:10,312 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 15:43:10,312 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 15:43:10,312 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 15:43:10,313 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 15:43:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-12-03 15:43:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 15:43:10,335 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:10,336 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 15:43:10,338 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:10,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-12-03 15:43:10,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:10,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:10,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:10,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:10,394 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:10,487 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 15:43:10,489 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:43:10,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 15:43:10,490 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:43:10,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 15:43:10,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 15:43:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 15:43:10,508 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-12-03 15:43:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:10,572 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-12-03 15:43:10,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 15:43:10,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-03 15:43:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:10,594 INFO L225 Difference]: With dead ends: 9 [2018-12-03 15:43:10,595 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 15:43:10,599 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 15:43:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 15:43:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 15:43:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 15:43:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 15:43:10,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 15:43:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:10,637 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 15:43:10,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 15:43:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 15:43:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 15:43:10,637 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:10,638 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-03 15:43:10,638 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:10,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-12-03 15:43:10,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:10,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:10,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:10,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:10,640 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:10,786 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 15:43:10,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:10,786 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:10,787 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-03 15:43:10,789 INFO L205 CegarAbsIntRunner]: [0], [5], [7], [9] [2018-12-03 15:43:10,833 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 15:43:10,833 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 15:43:10,989 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 15:43:10,991 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 1 different actions 3 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-03 15:43:11,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:11,033 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 15:43:11,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:11,033 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 15:43:11,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:11,049 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:43:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:11,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:11,123 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 15:43:11,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:11,264 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 15:43:11,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:11,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-03 15:43:11,284 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:11,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 15:43:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 15:43:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 15:43:11,286 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-12-03 15:43:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:11,323 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-03 15:43:11,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 15:43:11,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-03 15:43:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:11,324 INFO L225 Difference]: With dead ends: 8 [2018-12-03 15:43:11,324 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 15:43:11,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 15:43:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 15:43:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 15:43:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 15:43:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 15:43:11,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 15:43:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:11,329 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 15:43:11,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 15:43:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 15:43:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 15:43:11,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:11,331 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-03 15:43:11,331 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:11,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:11,332 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-12-03 15:43:11,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:11,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:11,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:11,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:11,336 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:11,420 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 15:43:11,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:11,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:11,421 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:43:11,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:43:11,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:11,421 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 15:43:11,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:43:11,433 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:43:11,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 15:43:11,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:43:11,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:11,462 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 15:43:11,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:11,547 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 15:43:11,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:11,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-03 15:43:11,575 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:11,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 15:43:11,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 15:43:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 15:43:11,577 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-12-03 15:43:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:11,682 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 15:43:11,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 15:43:11,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-12-03 15:43:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:11,683 INFO L225 Difference]: With dead ends: 9 [2018-12-03 15:43:11,683 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 15:43:11,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 15:43:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 15:43:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 15:43:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 15:43:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 15:43:11,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-03 15:43:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:11,687 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 15:43:11,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 15:43:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 15:43:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 15:43:11,688 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:11,688 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-03 15:43:11,688 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:11,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:11,689 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-12-03 15:43:11,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:11,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:11,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:43:11,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:11,691 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:11,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:11,923 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:11,924 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:43:11,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:43:11,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:11,924 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:43:11,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:43:11,934 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:43:11,952 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:43:11,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:43:11,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:11,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:12,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:12,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-03 15:43:12,270 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:12,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 15:43:12,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 15:43:12,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:12,271 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-12-03 15:43:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:12,289 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 15:43:12,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 15:43:12,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-12-03 15:43:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:12,293 INFO L225 Difference]: With dead ends: 10 [2018-12-03 15:43:12,293 INFO L226 Difference]: Without dead ends: 8 [2018-12-03 15:43:12,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-03 15:43:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-03 15:43:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-03 15:43:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-12-03 15:43:12,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-12-03 15:43:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:12,297 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-12-03 15:43:12,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 15:43:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-03 15:43:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-03 15:43:12,299 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:12,299 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-12-03 15:43:12,299 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:12,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-12-03 15:43:12,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:12,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:12,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:43:12,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:12,301 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:12,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:12,483 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:12,483 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:43:12,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:43:12,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:12,484 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:43:12,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:12,495 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:43:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:12,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:12,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:12,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:12,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2018-12-03 15:43:12,624 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:12,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 15:43:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 15:43:12,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:12,625 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-12-03 15:43:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:12,654 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-03 15:43:12,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 15:43:12,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-12-03 15:43:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:12,655 INFO L225 Difference]: With dead ends: 11 [2018-12-03 15:43:12,655 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 15:43:12,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 15:43:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 15:43:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 15:43:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 15:43:12,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-12-03 15:43:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:12,659 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 15:43:12,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 15:43:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 15:43:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 15:43:12,660 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:12,660 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-12-03 15:43:12,661 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:12,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-12-03 15:43:12,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:12,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:12,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:12,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:12,663 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:12,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:12,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:12,767 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:43:12,768 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:43:12,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:12,768 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:43:12,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:43:12,778 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:43:12,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-03 15:43:12,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:43:12,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:12,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:12,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:12,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2018-12-03 15:43:12,961 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:12,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 15:43:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 15:43:12,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:12,963 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-12-03 15:43:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:12,988 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-12-03 15:43:12,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 15:43:12,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-12-03 15:43:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:12,989 INFO L225 Difference]: With dead ends: 12 [2018-12-03 15:43:12,990 INFO L226 Difference]: Without dead ends: 10 [2018-12-03 15:43:12,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-12-03 15:43:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-03 15:43:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-03 15:43:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-12-03 15:43:12,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-12-03 15:43:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:12,994 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-12-03 15:43:12,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 15:43:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-12-03 15:43:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-03 15:43:12,994 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:12,994 INFO L402 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-12-03 15:43:12,995 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:12,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:12,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-12-03 15:43:12,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:12,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:12,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:43:12,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:12,996 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:13,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:13,115 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:13,116 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:43:13,116 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:43:13,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:13,116 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:43:13,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 15:43:13,125 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 15:43:13,161 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 15:43:13,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:43:13,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:13,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:13,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:13,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2018-12-03 15:43:13,567 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:13,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 15:43:13,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 15:43:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:13,568 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-12-03 15:43:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:13,589 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-12-03 15:43:13,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 15:43:13,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-12-03 15:43:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:13,592 INFO L225 Difference]: With dead ends: 13 [2018-12-03 15:43:13,593 INFO L226 Difference]: Without dead ends: 11 [2018-12-03 15:43:13,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-03 15:43:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-12-03 15:43:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-03 15:43:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-12-03 15:43:13,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-12-03 15:43:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:13,598 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-12-03 15:43:13,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 15:43:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-12-03 15:43:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-03 15:43:13,598 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:13,598 INFO L402 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-12-03 15:43:13,599 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:13,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-12-03 15:43:13,599 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:13,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:13,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:43:13,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:13,601 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:13,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:13,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:13,716 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:43:13,716 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:43:13,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:13,716 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:43:13,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:13,729 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 15:43:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:13,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:13,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:13,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:13,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2018-12-03 15:43:13,845 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:13,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 15:43:13,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 15:43:13,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:13,846 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-12-03 15:43:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:13,938 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-12-03 15:43:13,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 15:43:13,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-12-03 15:43:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:13,939 INFO L225 Difference]: With dead ends: 14 [2018-12-03 15:43:13,939 INFO L226 Difference]: Without dead ends: 12 [2018-12-03 15:43:13,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 15:43:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-03 15:43:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-03 15:43:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-03 15:43:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-03 15:43:13,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-03 15:43:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:13,942 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-03 15:43:13,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 15:43:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-03 15:43:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-03 15:43:13,943 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:13,943 INFO L402 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-12-03 15:43:13,943 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:13,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-12-03 15:43:13,944 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:13,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:13,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 15:43:13,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:13,945 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:14,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:14,365 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 15:43:14,365 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 15:43:14,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 15:43:14,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 15:43:14,366 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 15:43:14,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 15:43:14,375 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 15:43:14,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-03 15:43:14,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 15:43:14,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 15:43:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:14,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 15:43:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:14,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 15:43:14,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-12-03 15:43:14,743 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 15:43:14,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 15:43:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 15:43:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2018-12-03 15:43:14,744 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-12-03 15:43:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:14,871 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-12-03 15:43:14,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 15:43:14,872 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-12-03 15:43:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:14,873 INFO L225 Difference]: With dead ends: 15 [2018-12-03 15:43:14,873 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 15:43:14,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2018-12-03 15:43:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 15:43:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-03 15:43:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-03 15:43:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-12-03 15:43:14,878 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-12-03 15:43:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:14,879 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-12-03 15:43:14,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 15:43:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-12-03 15:43:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-03 15:43:14,879 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 15:43:14,880 INFO L402 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-12-03 15:43:14,880 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 15:43:14,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 15:43:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-12-03 15:43:14,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 15:43:14,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:14,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 15:43:14,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 15:43:14,882 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 15:43:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 15:43:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 15:43:15,046 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 15:43:15,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-12-03 15:43:15,046 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 15:43:15,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 15:43:15,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 15:43:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-03 15:43:15,048 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 11 states. [2018-12-03 15:43:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 15:43:15,070 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-12-03 15:43:15,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 15:43:15,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2018-12-03 15:43:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 15:43:15,073 INFO L225 Difference]: With dead ends: 13 [2018-12-03 15:43:15,073 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 15:43:15,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-03 15:43:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 15:43:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 15:43:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 15:43:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 15:43:15,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-12-03 15:43:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 15:43:15,075 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 15:43:15,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 15:43:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 15:43:15,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 15:43:15,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 15:43:15,266 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 38) no Hoare annotation was computed. [2018-12-03 15:43:15,267 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 37) no Hoare annotation was computed. [2018-12-03 15:43:15,267 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 1 38) no Hoare annotation was computed. [2018-12-03 15:43:15,267 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 38) no Hoare annotation was computed. [2018-12-03 15:43:15,267 INFO L444 ceAbstractionStarter]: At program point L28(lines 28 36) the Hoare annotation is: false [2018-12-03 15:43:15,268 INFO L444 ceAbstractionStarter]: At program point L35(lines 15 35) the Hoare annotation is: (or (and (<= 1 ULTIMATE.start_main_~i~4) (<= ULTIMATE.start_main_~sn~4 0) (<= 0 ULTIMATE.start_main_~sn~4) (<= ULTIMATE.start_main_~i~4 1)) (and (<= 3 ULTIMATE.start_main_~i~4) (<= ULTIMATE.start_main_~i~4 3) (<= 4 ULTIMATE.start_main_~sn~4) (<= ULTIMATE.start_main_~sn~4 4)) (and (<= 9 ULTIMATE.start_main_~i~4) (<= ULTIMATE.start_main_~sn~4 16) (<= 16 ULTIMATE.start_main_~sn~4)) (and (<= ULTIMATE.start_main_~sn~4 10) (<= 6 ULTIMATE.start_main_~i~4) (<= 10 ULTIMATE.start_main_~sn~4) (<= ULTIMATE.start_main_~i~4 6)) (and (<= ULTIMATE.start_main_~sn~4 6) (<= ULTIMATE.start_main_~i~4 4) (<= 6 ULTIMATE.start_main_~sn~4) (<= 4 ULTIMATE.start_main_~i~4)) (and (<= 2 ULTIMATE.start_main_~sn~4) (<= 2 ULTIMATE.start_main_~i~4) (<= ULTIMATE.start_main_~i~4 2) (<= ULTIMATE.start_main_~sn~4 2)) (and (<= 8 ULTIMATE.start_main_~sn~4) (<= ULTIMATE.start_main_~i~4 5) (<= 5 ULTIMATE.start_main_~i~4) (<= ULTIMATE.start_main_~sn~4 8)) (and (<= ULTIMATE.start_main_~i~4 7) (<= ULTIMATE.start_main_~sn~4 12) (<= 7 ULTIMATE.start_main_~i~4) (<= 12 ULTIMATE.start_main_~sn~4)) (and (<= ULTIMATE.start_main_~sn~4 14) (<= ULTIMATE.start_main_~i~4 8) (<= 8 ULTIMATE.start_main_~i~4) (<= 14 ULTIMATE.start_main_~sn~4))) [2018-12-03 15:43:15,278 INFO L202 PluginConnector]: Adding new model sum04.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:43:15 BoogieIcfgContainer [2018-12-03 15:43:15,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 15:43:15,279 INFO L168 Benchmark]: Toolchain (without parser) took 5419.45 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 700.4 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -716.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:43:15,281 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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 15:43:15,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.42 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 15:43:15,282 INFO L168 Benchmark]: Boogie Preprocessor took 20.74 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 15:43:15,283 INFO L168 Benchmark]: RCFGBuilder took 321.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 15:43:15,284 INFO L168 Benchmark]: TraceAbstraction took 5038.17 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 700.4 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -737.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 15:43:15,287 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 0.20 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 35.42 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 20.74 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 321.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5038.17 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 700.4 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -737.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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: 28]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: ((((((((((1 <= main_~i~4 && main_~sn~4 <= 0) && 0 <= main_~sn~4) && main_~i~4 <= 1) || (((3 <= main_~i~4 && main_~i~4 <= 3) && 4 <= main_~sn~4) && main_~sn~4 <= 4)) || ((9 <= main_~i~4 && main_~sn~4 <= 16) && 16 <= main_~sn~4)) || (((main_~sn~4 <= 10 && 6 <= main_~i~4) && 10 <= main_~sn~4) && main_~i~4 <= 6)) || (((main_~sn~4 <= 6 && main_~i~4 <= 4) && 6 <= main_~sn~4) && 4 <= main_~i~4)) || (((2 <= main_~sn~4 && 2 <= main_~i~4) && main_~i~4 <= 2) && main_~sn~4 <= 2)) || (((8 <= main_~sn~4 && main_~i~4 <= 5) && 5 <= main_~i~4) && main_~sn~4 <= 8)) || (((main_~i~4 <= 7 && main_~sn~4 <= 12) && 7 <= main_~i~4) && 12 <= main_~sn~4)) || (((main_~sn~4 <= 14 && main_~i~4 <= 8) && 8 <= main_~i~4) && 14 <= main_~sn~4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 4.9s OverallTime, 10 OverallIterations, 9 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 0 SDslu, 42 SDs, 0 SdLazy, 192 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 70 SyntacticMatches, 20 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 11 NumberOfFragments, 116 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 4675 SizeOfPredicates, 9 NumberOfNonLiveVariables, 292 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 45/405 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...