java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1de736e-m [2019-02-15 11:14:14,692 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-15 11:14:14,697 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-15 11:14:14,712 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-15 11:14:14,713 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-15 11:14:14,714 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-15 11:14:14,715 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-15 11:14:14,717 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-15 11:14:14,718 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-15 11:14:14,719 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-15 11:14:14,720 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-02-15 11:14:14,766 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-02-15 11:14:14,788 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-15 11:14:14,788 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-15 11:14:14,790 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-15 11:14:14,790 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-15 11:14:14,790 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-15 11:14:14,790 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-15 11:14:14,791 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-15 11:14:14,791 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-15 11:14:14,791 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-15 11:14:14,791 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-02-15 11:14:14,791 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-02-15 11:14:14,791 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-15 11:14:14,792 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-15 11:14:14,793 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-15 11:14:14,793 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-15 11:14:14,793 INFO L133 SettingsManager]: * Use SBE=true [2019-02-15 11:14:14,793 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-15 11:14:14,794 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-15 11:14:14,795 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-15 11:14:14,796 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-15 11:14:14,796 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-15 11:14:14,796 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-15 11:14:14,796 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-15 11:14:14,796 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-15 11:14:14,796 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-15 11:14:14,797 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-15 11:14:14,797 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-15 11:14:14,797 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-15 11:14:14,797 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-15 11:14:14,798 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-15 11:14:14,798 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-02-15 11:14:14,798 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-15 11:14:14,798 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-15 11:14:14,798 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-15 11:14:14,799 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-15 11:14:14,799 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-15 11:14:14,799 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-02-15 11:14:14,799 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-15 11:14:14,800 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-15 11:14:14,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-15 11:14:14,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-15 11:14:14,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-15 11:14:14,851 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-15 11:14:14,852 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-15 11:14:14,853 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl [2019-02-15 11:14:14,853 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl' [2019-02-15 11:14:14,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-15 11:14:14,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-15 11:14:14,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-15 11:14:14,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-15 11:14:14,900 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-15 11:14:14,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,939 WARN L165 Inliner]: Program contained no entry procedure! [2019-02-15 11:14:14,939 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-02-15 11:14:14,940 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-02-15 11:14:14,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-15 11:14:14,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-15 11:14:14,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-15 11:14:14,961 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-15 11:14:14,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... [2019-02-15 11:14:14,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-15 11:14:14,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-15 11:14:14,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-15 11:14:14,983 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-15 11:14:14,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-02-15 11:14:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-02-15 11:14:15,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-02-15 11:14:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure ~malloc [2019-02-15 11:14:15,227 INFO L278 CfgBuilder]: Using library mode [2019-02-15 11:14:15,228 INFO L286 CfgBuilder]: Removed 3 assue(true) statements. [2019-02-15 11:14:15,229 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:14:15 BoogieIcfgContainer [2019-02-15 11:14:15,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-15 11:14:15,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-15 11:14:15,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-15 11:14:15,233 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-15 11:14:15,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 11:14:14" (1/2) ... [2019-02-15 11:14:15,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7a09b1 and model type PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:14:15, skipping insertion in model container [2019-02-15 11:14:15,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:14:15" (2/2) ... [2019-02-15 11:14:15,237 INFO L112 eAbstractionObserver]: Analyzing ICFG PointerIncrement-simplified03.bpl [2019-02-15 11:14:15,246 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-15 11:14:15,254 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-02-15 11:14:15,267 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-02-15 11:14:15,293 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-15 11:14:15,293 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-15 11:14:15,293 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-15 11:14:15,294 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-15 11:14:15,294 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-15 11:14:15,294 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-15 11:14:15,294 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-15 11:14:15,294 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-15 11:14:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-02-15 11:14:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:14:15,311 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:15,312 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:14:15,314 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2019-02-15 11:14:15,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:15,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:15,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:15,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:15,364 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:15,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-15 11:14:15,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-15 11:14:15,534 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:14:15,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-15 11:14:15,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-15 11:14:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 11:14:15,578 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-02-15 11:14:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:15,739 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-02-15 11:14:15,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 11:14:15,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-15 11:14:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:15,751 INFO L225 Difference]: With dead ends: 15 [2019-02-15 11:14:15,751 INFO L226 Difference]: Without dead ends: 8 [2019-02-15 11:14:15,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 11:14:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-02-15 11:14:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-02-15 11:14:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-02-15 11:14:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-02-15 11:14:15,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 3 [2019-02-15 11:14:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:15,788 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-02-15 11:14:15,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-15 11:14:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-02-15 11:14:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-15 11:14:15,790 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:15,790 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-02-15 11:14:15,790 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash 893294860, now seen corresponding path program 1 times [2019-02-15 11:14:15,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:15,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:15,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:15,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:15,793 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:15,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:15,967 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:15,968 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-15 11:14:15,970 INFO L207 CegarAbsIntRunner]: [0], [6], [7], [8], [12] [2019-02-15 11:14:16,036 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:14:16,037 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:14:23,988 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:14:23,990 INFO L272 AbstractInterpreter]: Visited 5 different actions 38 times. Merged at 4 different actions 33 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-15 11:14:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:23,998 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:14:23,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:23,999 INFO L193 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 [2019-02-15 11:14:24,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:24,015 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:24,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:24,104 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 [2019-02-15 11:14:24,105 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:24,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:24,209 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:24,287 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:24,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:24,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:14:24,383 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:24,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:14:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:14:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:14:24,385 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-02-15 11:14:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:24,480 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-02-15 11:14:24,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-15 11:14:24,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-02-15 11:14:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:24,481 INFO L225 Difference]: With dead ends: 12 [2019-02-15 11:14:24,482 INFO L226 Difference]: Without dead ends: 11 [2019-02-15 11:14:24,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:14:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-02-15 11:14:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-02-15 11:14:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-02-15 11:14:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-02-15 11:14:24,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2019-02-15 11:14:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:24,486 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-02-15 11:14:24,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:14:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-02-15 11:14:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-02-15 11:14:24,487 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:24,487 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1] [2019-02-15 11:14:24,488 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash 529849760, now seen corresponding path program 2 times [2019-02-15 11:14:24,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:24,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:24,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:24,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:24,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:24,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:24,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:24,675 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:24,676 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:24,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:24,676 INFO L193 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 [2019-02-15 11:14:24,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:24,691 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:24,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-15 11:14:24,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:24,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:24,770 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 [2019-02-15 11:14:24,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:24,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:24,848 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:24,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:24,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:24,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:14:24,980 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:24,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:14:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:14:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:14:24,981 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-02-15 11:14:25,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:25,116 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-02-15 11:14:25,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:14:25,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-02-15 11:14:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:25,118 INFO L225 Difference]: With dead ends: 15 [2019-02-15 11:14:25,118 INFO L226 Difference]: Without dead ends: 14 [2019-02-15 11:14:25,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:14:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-02-15 11:14:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-02-15 11:14:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-02-15 11:14:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-02-15 11:14:25,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2019-02-15 11:14:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:25,123 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-02-15 11:14:25,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:14:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-02-15 11:14:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-02-15 11:14:25,124 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:25,124 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1] [2019-02-15 11:14:25,124 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash 749428876, now seen corresponding path program 3 times [2019-02-15 11:14:25,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:25,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:25,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:25,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:25,126 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:25,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:25,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:25,205 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:25,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:25,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:25,206 INFO L193 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 [2019-02-15 11:14:25,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:25,217 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:25,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:25,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:25,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:25,243 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 [2019-02-15 11:14:25,243 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:25,255 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:25,256 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:25,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:25,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:25,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-15 11:14:25,457 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:25,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 11:14:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 11:14:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-02-15 11:14:25,459 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-02-15 11:14:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:25,783 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-02-15 11:14:25,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:14:25,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-02-15 11:14:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:25,784 INFO L225 Difference]: With dead ends: 18 [2019-02-15 11:14:25,785 INFO L226 Difference]: Without dead ends: 17 [2019-02-15 11:14:25,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-02-15 11:14:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-02-15 11:14:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-02-15 11:14:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-02-15 11:14:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-02-15 11:14:25,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2019-02-15 11:14:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:25,790 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-02-15 11:14:25,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 11:14:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-02-15 11:14:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-02-15 11:14:25,790 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:25,790 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1] [2019-02-15 11:14:25,791 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash 995681824, now seen corresponding path program 4 times [2019-02-15 11:14:25,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:25,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:25,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:25,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:25,792 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:25,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:25,896 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:25,896 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:25,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:25,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:25,897 INFO L193 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 [2019-02-15 11:14:25,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:25,915 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:25,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:25,935 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 [2019-02-15 11:14:25,936 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:25,954 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:25,955 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:26,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:26,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:26,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-15 11:14:26,136 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:26,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-15 11:14:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-15 11:14:26,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-02-15 11:14:26,137 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2019-02-15 11:14:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:26,181 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-02-15 11:14:26,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-15 11:14:26,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-02-15 11:14:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:26,183 INFO L225 Difference]: With dead ends: 21 [2019-02-15 11:14:26,183 INFO L226 Difference]: Without dead ends: 20 [2019-02-15 11:14:26,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-02-15 11:14:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-02-15 11:14:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-02-15 11:14:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-02-15 11:14:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-02-15 11:14:26,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2019-02-15 11:14:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:26,188 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-02-15 11:14:26,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-15 11:14:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-02-15 11:14:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-02-15 11:14:26,189 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:26,189 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1] [2019-02-15 11:14:26,189 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1313114124, now seen corresponding path program 5 times [2019-02-15 11:14:26,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:26,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:26,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:26,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:26,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:26,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:26,285 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:26,285 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:26,285 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:26,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:26,285 INFO L193 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 [2019-02-15 11:14:26,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:26,297 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:26,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-02-15 11:14:26,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:26,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:26,334 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 [2019-02-15 11:14:26,334 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:26,348 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:26,349 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:26,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:26,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:26,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-02-15 11:14:26,636 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:26,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-02-15 11:14:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-02-15 11:14:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-02-15 11:14:26,637 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 14 states. [2019-02-15 11:14:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:26,704 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-02-15 11:14:26,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 11:14:26,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-02-15 11:14:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:26,705 INFO L225 Difference]: With dead ends: 24 [2019-02-15 11:14:26,705 INFO L226 Difference]: Without dead ends: 23 [2019-02-15 11:14:26,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-02-15 11:14:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-02-15 11:14:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-02-15 11:14:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-02-15 11:14:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-02-15 11:14:26,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2019-02-15 11:14:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:26,712 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-02-15 11:14:26,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-02-15 11:14:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-02-15 11:14:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-02-15 11:14:26,713 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:26,713 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1] [2019-02-15 11:14:26,713 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash 420777632, now seen corresponding path program 6 times [2019-02-15 11:14:26,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:26,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:26,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:26,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:26,715 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:26,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:26,854 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:26,854 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:26,854 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:26,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:26,855 INFO L193 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 [2019-02-15 11:14:26,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:26,866 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:26,883 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:26,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:26,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:26,907 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 [2019-02-15 11:14:26,907 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:26,918 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:26,918 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:27,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:27,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:27,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2019-02-15 11:14:27,158 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:27,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-02-15 11:14:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-02-15 11:14:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-02-15 11:14:27,160 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2019-02-15 11:14:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:27,245 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-02-15 11:14:27,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-15 11:14:27,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-02-15 11:14:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:27,248 INFO L225 Difference]: With dead ends: 27 [2019-02-15 11:14:27,249 INFO L226 Difference]: Without dead ends: 26 [2019-02-15 11:14:27,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-02-15 11:14:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-02-15 11:14:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-02-15 11:14:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-15 11:14:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-02-15 11:14:27,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2019-02-15 11:14:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:27,254 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-02-15 11:14:27,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-02-15 11:14:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-02-15 11:14:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-02-15 11:14:27,255 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:27,255 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1] [2019-02-15 11:14:27,255 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1623060596, now seen corresponding path program 7 times [2019-02-15 11:14:27,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:27,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:27,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:27,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:27,257 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:27,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:27,363 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:27,364 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:27,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:27,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:27,364 INFO L193 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 [2019-02-15 11:14:27,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:27,373 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:27,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:27,390 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 [2019-02-15 11:14:27,391 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:27,404 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:27,404 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:27,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:27,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:27,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2019-02-15 11:14:27,699 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:27,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-02-15 11:14:27,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-02-15 11:14:27,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-02-15 11:14:27,701 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 18 states. [2019-02-15 11:14:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:27,880 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-02-15 11:14:27,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-15 11:14:27,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-02-15 11:14:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:27,883 INFO L225 Difference]: With dead ends: 30 [2019-02-15 11:14:27,883 INFO L226 Difference]: Without dead ends: 29 [2019-02-15 11:14:27,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-02-15 11:14:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-02-15 11:14:27,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-02-15 11:14:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-02-15 11:14:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-02-15 11:14:27,888 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2019-02-15 11:14:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:27,888 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-02-15 11:14:27,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-02-15 11:14:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-02-15 11:14:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-02-15 11:14:27,890 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:27,890 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1] [2019-02-15 11:14:27,890 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:27,890 INFO L82 PathProgramCache]: Analyzing trace with hash 143644448, now seen corresponding path program 8 times [2019-02-15 11:14:27,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:27,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:27,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:27,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:27,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:28,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:28,080 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:28,080 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:28,081 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:28,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:28,081 INFO L193 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 [2019-02-15 11:14:28,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:28,095 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:28,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-02-15 11:14:28,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:28,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:28,129 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 [2019-02-15 11:14:28,129 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:28,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:28,139 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:28,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:28,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:28,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2019-02-15 11:14:28,461 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:28,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-02-15 11:14:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-02-15 11:14:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-02-15 11:14:28,463 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-02-15 11:14:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:28,638 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-02-15 11:14:28,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-02-15 11:14:28,639 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-02-15 11:14:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:28,640 INFO L225 Difference]: With dead ends: 33 [2019-02-15 11:14:28,640 INFO L226 Difference]: Without dead ends: 32 [2019-02-15 11:14:28,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-02-15 11:14:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-15 11:14:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-02-15 11:14:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-02-15 11:14:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-02-15 11:14:28,645 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2019-02-15 11:14:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:28,646 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-02-15 11:14:28,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-02-15 11:14:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-02-15 11:14:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-02-15 11:14:28,647 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:28,647 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1] [2019-02-15 11:14:28,647 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:28,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1524365068, now seen corresponding path program 9 times [2019-02-15 11:14:28,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:28,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:28,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:28,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:28,649 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:28,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:28,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:28,816 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:28,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:28,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:28,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:28,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:28,826 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:28,837 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:28,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:28,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:28,854 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 [2019-02-15 11:14:28,854 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:28,867 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:28,868 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:29,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:29,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:29,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2019-02-15 11:14:29,379 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:29,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-02-15 11:14:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-02-15 11:14:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-02-15 11:14:29,381 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2019-02-15 11:14:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:29,455 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-02-15 11:14:29,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-02-15 11:14:29,456 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-02-15 11:14:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:29,457 INFO L225 Difference]: With dead ends: 36 [2019-02-15 11:14:29,457 INFO L226 Difference]: Without dead ends: 35 [2019-02-15 11:14:29,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-02-15 11:14:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-02-15 11:14:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-02-15 11:14:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-02-15 11:14:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-02-15 11:14:29,464 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2019-02-15 11:14:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:29,464 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-02-15 11:14:29,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-02-15 11:14:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-02-15 11:14:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-02-15 11:14:29,465 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:29,465 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1] [2019-02-15 11:14:29,466 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:29,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:29,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1670561696, now seen corresponding path program 10 times [2019-02-15 11:14:29,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:29,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:29,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:29,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:29,468 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:29,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:29,689 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:29,689 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:29,689 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:29,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:29,689 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:29,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:29,698 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:29,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:29,746 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 [2019-02-15 11:14:29,747 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:29,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:29,754 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:29,898 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:30,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:30,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2019-02-15 11:14:30,112 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:30,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-02-15 11:14:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-02-15 11:14:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-02-15 11:14:30,114 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 24 states. [2019-02-15 11:14:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:30,205 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-02-15 11:14:30,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-02-15 11:14:30,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2019-02-15 11:14:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:30,209 INFO L225 Difference]: With dead ends: 39 [2019-02-15 11:14:30,210 INFO L226 Difference]: Without dead ends: 38 [2019-02-15 11:14:30,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-02-15 11:14:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-02-15 11:14:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-02-15 11:14:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-02-15 11:14:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-02-15 11:14:30,215 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2019-02-15 11:14:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:30,215 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-02-15 11:14:30,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-02-15 11:14:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-02-15 11:14:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-02-15 11:14:30,216 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:30,216 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1] [2019-02-15 11:14:30,216 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1917468300, now seen corresponding path program 11 times [2019-02-15 11:14:30,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:30,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:30,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:30,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:30,218 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:30,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:30,588 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:30,589 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:30,589 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:30,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:30,589 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:30,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:30,599 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:30,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-02-15 11:14:30,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:30,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:30,667 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 [2019-02-15 11:14:30,668 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:30,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:30,690 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:30,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:31,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:31,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2019-02-15 11:14:31,190 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:31,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-02-15 11:14:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-02-15 11:14:31,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-02-15 11:14:31,192 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 26 states. [2019-02-15 11:14:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:31,288 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-02-15 11:14:31,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-02-15 11:14:31,289 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2019-02-15 11:14:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:31,290 INFO L225 Difference]: With dead ends: 42 [2019-02-15 11:14:31,290 INFO L226 Difference]: Without dead ends: 41 [2019-02-15 11:14:31,292 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-02-15 11:14:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-02-15 11:14:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-02-15 11:14:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-02-15 11:14:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-02-15 11:14:31,297 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2019-02-15 11:14:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:31,297 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-02-15 11:14:31,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-02-15 11:14:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-02-15 11:14:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-02-15 11:14:31,298 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:31,299 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1] [2019-02-15 11:14:31,299 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:31,299 INFO L82 PathProgramCache]: Analyzing trace with hash 233130016, now seen corresponding path program 12 times [2019-02-15 11:14:31,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:31,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:31,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:31,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:31,301 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:31,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:31,502 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:31,502 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:31,502 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:31,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:31,502 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:31,522 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:31,522 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:31,540 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:31,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:31,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:31,547 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 [2019-02-15 11:14:31,548 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:31,554 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:31,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:31,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:32,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:32,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2019-02-15 11:14:32,022 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:32,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-02-15 11:14:32,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-02-15 11:14:32,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-02-15 11:14:32,023 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 28 states. [2019-02-15 11:14:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:32,102 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-02-15 11:14:32,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-02-15 11:14:32,103 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2019-02-15 11:14:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:32,104 INFO L225 Difference]: With dead ends: 45 [2019-02-15 11:14:32,104 INFO L226 Difference]: Without dead ends: 44 [2019-02-15 11:14:32,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-02-15 11:14:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-02-15 11:14:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-02-15 11:14:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-15 11:14:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-02-15 11:14:32,110 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2019-02-15 11:14:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:32,111 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-02-15 11:14:32,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-02-15 11:14:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-02-15 11:14:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-02-15 11:14:32,112 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:32,112 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1] [2019-02-15 11:14:32,112 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:32,112 INFO L82 PathProgramCache]: Analyzing trace with hash 214230540, now seen corresponding path program 13 times [2019-02-15 11:14:32,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:32,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:32,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:32,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:32,113 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:32,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:32,306 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:32,307 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:32,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:32,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:32,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:32,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:32,317 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:32,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:32,339 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 [2019-02-15 11:14:32,339 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:32,343 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:32,344 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:32,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:33,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:33,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2019-02-15 11:14:33,273 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:33,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-02-15 11:14:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-02-15 11:14:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-02-15 11:14:33,275 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 30 states. [2019-02-15 11:14:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:33,388 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-02-15 11:14:33,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-02-15 11:14:33,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2019-02-15 11:14:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:33,390 INFO L225 Difference]: With dead ends: 48 [2019-02-15 11:14:33,390 INFO L226 Difference]: Without dead ends: 47 [2019-02-15 11:14:33,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-02-15 11:14:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-02-15 11:14:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-02-15 11:14:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-02-15 11:14:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-02-15 11:14:33,396 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2019-02-15 11:14:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:33,397 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-02-15 11:14:33,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-02-15 11:14:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-02-15 11:14:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-02-15 11:14:33,398 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:33,398 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1] [2019-02-15 11:14:33,398 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -179343200, now seen corresponding path program 14 times [2019-02-15 11:14:33,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:33,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:33,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:33,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:33,399 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:33,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:33,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:33,659 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:33,659 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:33,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:33,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:33,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:33,672 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:33,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-02-15 11:14:33,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:33,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:33,772 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 [2019-02-15 11:14:33,773 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:33,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:33,783 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:34,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:34,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:34,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2019-02-15 11:14:34,469 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:34,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-02-15 11:14:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-02-15 11:14:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-02-15 11:14:34,471 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 32 states. [2019-02-15 11:14:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:34,682 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-02-15 11:14:34,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-02-15 11:14:34,683 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2019-02-15 11:14:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:34,684 INFO L225 Difference]: With dead ends: 51 [2019-02-15 11:14:34,684 INFO L226 Difference]: Without dead ends: 50 [2019-02-15 11:14:34,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-02-15 11:14:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-02-15 11:14:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-02-15 11:14:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-02-15 11:14:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-02-15 11:14:34,693 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2019-02-15 11:14:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:34,693 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-02-15 11:14:34,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-02-15 11:14:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-02-15 11:14:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-02-15 11:14:34,697 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:34,697 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1] [2019-02-15 11:14:34,697 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:34,697 INFO L82 PathProgramCache]: Analyzing trace with hash 126086540, now seen corresponding path program 15 times [2019-02-15 11:14:34,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:34,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:34,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:34,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:34,699 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:35,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:35,043 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:35,044 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:35,044 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:35,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:35,044 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:35,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:35,053 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:35,067 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:35,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:35,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:35,081 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 [2019-02-15 11:14:35,081 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:35,085 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:35,085 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:35,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:35,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:35,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2019-02-15 11:14:35,725 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:35,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-02-15 11:14:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-02-15 11:14:35,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-02-15 11:14:35,727 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 34 states. [2019-02-15 11:14:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:35,831 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-02-15 11:14:35,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-02-15 11:14:35,831 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2019-02-15 11:14:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:35,832 INFO L225 Difference]: With dead ends: 54 [2019-02-15 11:14:35,832 INFO L226 Difference]: Without dead ends: 53 [2019-02-15 11:14:35,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-02-15 11:14:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-02-15 11:14:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-02-15 11:14:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-02-15 11:14:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-02-15 11:14:35,840 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 48 [2019-02-15 11:14:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:35,840 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-02-15 11:14:35,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-02-15 11:14:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-02-15 11:14:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-02-15 11:14:35,841 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:35,841 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1] [2019-02-15 11:14:35,841 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:35,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1852229344, now seen corresponding path program 16 times [2019-02-15 11:14:35,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:35,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:35,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:35,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:35,843 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:36,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:36,751 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:36,751 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:36,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:36,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:36,751 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:36,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:36,760 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:36,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:36,802 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 [2019-02-15 11:14:36,802 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:36,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:36,806 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:38,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:39,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:39,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2019-02-15 11:14:39,305 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:39,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-02-15 11:14:39,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-02-15 11:14:39,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-02-15 11:14:39,307 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 36 states. [2019-02-15 11:14:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:39,431 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-02-15 11:14:39,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-02-15 11:14:39,431 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2019-02-15 11:14:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:39,432 INFO L225 Difference]: With dead ends: 57 [2019-02-15 11:14:39,432 INFO L226 Difference]: Without dead ends: 56 [2019-02-15 11:14:39,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-02-15 11:14:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-02-15 11:14:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-02-15 11:14:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-02-15 11:14:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-02-15 11:14:39,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 51 [2019-02-15 11:14:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:39,439 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-02-15 11:14:39,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-02-15 11:14:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-02-15 11:14:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-02-15 11:14:39,440 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:39,440 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1] [2019-02-15 11:14:39,440 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1975473420, now seen corresponding path program 17 times [2019-02-15 11:14:39,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:39,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:39,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:39,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:39,442 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:39,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:39,686 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:39,686 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:39,686 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:39,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:39,687 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:39,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:39,703 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:39,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-02-15 11:14:39,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:39,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:39,785 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 [2019-02-15 11:14:39,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:39,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:39,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:40,111 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:40,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:40,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2019-02-15 11:14:40,546 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:40,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-02-15 11:14:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-02-15 11:14:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-02-15 11:14:40,548 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 38 states. [2019-02-15 11:14:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:40,661 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-02-15 11:14:40,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-02-15 11:14:40,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 54 [2019-02-15 11:14:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:40,662 INFO L225 Difference]: With dead ends: 60 [2019-02-15 11:14:40,662 INFO L226 Difference]: Without dead ends: 59 [2019-02-15 11:14:40,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-02-15 11:14:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-02-15 11:14:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-02-15 11:14:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-02-15 11:14:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-02-15 11:14:40,669 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 54 [2019-02-15 11:14:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:40,669 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-02-15 11:14:40,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-02-15 11:14:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-02-15 11:14:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-02-15 11:14:40,670 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:40,670 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1] [2019-02-15 11:14:40,670 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1686806944, now seen corresponding path program 18 times [2019-02-15 11:14:40,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:40,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:40,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:40,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:40,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:41,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:41,010 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:41,010 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:41,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:41,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:41,010 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:41,019 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:41,019 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:41,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:41,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:41,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:41,066 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 [2019-02-15 11:14:41,067 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:41,073 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:41,073 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:41,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:42,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:42,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2019-02-15 11:14:42,101 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:42,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-02-15 11:14:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-02-15 11:14:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-02-15 11:14:42,103 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 40 states. [2019-02-15 11:14:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:42,216 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-02-15 11:14:42,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-02-15 11:14:42,216 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 57 [2019-02-15 11:14:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:42,217 INFO L225 Difference]: With dead ends: 63 [2019-02-15 11:14:42,217 INFO L226 Difference]: Without dead ends: 62 [2019-02-15 11:14:42,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-02-15 11:14:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-02-15 11:14:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-02-15 11:14:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-02-15 11:14:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-02-15 11:14:42,224 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 57 [2019-02-15 11:14:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:42,224 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-02-15 11:14:42,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-02-15 11:14:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-02-15 11:14:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-02-15 11:14:42,225 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:42,225 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1] [2019-02-15 11:14:42,225 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash 548347020, now seen corresponding path program 19 times [2019-02-15 11:14:42,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:42,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:42,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:42,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:42,227 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:42,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:42,522 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:42,522 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:42,522 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:42,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:42,522 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:42,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:42,532 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:42,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:42,555 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 [2019-02-15 11:14:42,555 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:42,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:42,564 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:42,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:43,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:43,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2019-02-15 11:14:43,749 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:43,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-02-15 11:14:43,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-02-15 11:14:43,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-02-15 11:14:43,752 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 42 states. [2019-02-15 11:14:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:43,882 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-02-15 11:14:43,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-02-15 11:14:43,887 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2019-02-15 11:14:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:43,888 INFO L225 Difference]: With dead ends: 66 [2019-02-15 11:14:43,888 INFO L226 Difference]: Without dead ends: 65 [2019-02-15 11:14:43,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-02-15 11:14:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-02-15 11:14:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-02-15 11:14:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-02-15 11:14:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-02-15 11:14:43,892 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 60 [2019-02-15 11:14:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:43,893 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-02-15 11:14:43,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-02-15 11:14:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-02-15 11:14:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-02-15 11:14:43,893 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:43,894 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1] [2019-02-15 11:14:43,894 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2045487648, now seen corresponding path program 20 times [2019-02-15 11:14:43,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:43,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:43,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:43,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:43,895 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:44,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:44,294 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:44,294 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:44,294 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:44,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:44,294 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:44,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:44,303 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:44,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-02-15 11:14:44,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:44,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:44,347 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 [2019-02-15 11:14:44,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:44,360 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:44,360 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:44,753 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:45,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:45,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2019-02-15 11:14:45,425 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:45,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-02-15 11:14:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-02-15 11:14:45,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-02-15 11:14:45,427 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 44 states. [2019-02-15 11:14:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:45,555 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-02-15 11:14:45,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-02-15 11:14:45,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-02-15 11:14:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:45,557 INFO L225 Difference]: With dead ends: 69 [2019-02-15 11:14:45,557 INFO L226 Difference]: Without dead ends: 68 [2019-02-15 11:14:45,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-02-15 11:14:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-02-15 11:14:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-02-15 11:14:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-02-15 11:14:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-02-15 11:14:45,565 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 63 [2019-02-15 11:14:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:45,565 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-02-15 11:14:45,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-02-15 11:14:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-02-15 11:14:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-02-15 11:14:45,566 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:45,566 INFO L402 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1] [2019-02-15 11:14:45,567 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:45,567 INFO L82 PathProgramCache]: Analyzing trace with hash 126567436, now seen corresponding path program 21 times [2019-02-15 11:14:45,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:45,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:45,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:45,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:45,568 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:46,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:46,465 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:46,465 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:46,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:46,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:46,465 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:46,473 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:46,473 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:46,517 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:46,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:46,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:46,527 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 [2019-02-15 11:14:46,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:46,538 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:46,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:47,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:47,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:47,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2019-02-15 11:14:47,712 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:47,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-02-15 11:14:47,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-02-15 11:14:47,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-02-15 11:14:47,714 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 46 states. [2019-02-15 11:14:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:47,852 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-02-15 11:14:47,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-02-15 11:14:47,854 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2019-02-15 11:14:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:47,855 INFO L225 Difference]: With dead ends: 72 [2019-02-15 11:14:47,855 INFO L226 Difference]: Without dead ends: 71 [2019-02-15 11:14:47,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-02-15 11:14:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-02-15 11:14:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-02-15 11:14:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-02-15 11:14:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-02-15 11:14:47,861 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 66 [2019-02-15 11:14:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:47,861 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-02-15 11:14:47,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-02-15 11:14:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-02-15 11:14:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-02-15 11:14:47,861 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:47,862 INFO L402 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1] [2019-02-15 11:14:47,862 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash -410758496, now seen corresponding path program 22 times [2019-02-15 11:14:47,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:47,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:47,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:47,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:47,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:48,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:48,509 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:48,509 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:48,509 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:48,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:48,509 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:48,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:48,519 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:48,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:48,558 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 [2019-02-15 11:14:48,558 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:48,571 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:48,571 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:49,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:49,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:49,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2019-02-15 11:14:49,757 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:49,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-02-15 11:14:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-02-15 11:14:49,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-02-15 11:14:49,758 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 48 states. [2019-02-15 11:14:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:49,916 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-02-15 11:14:49,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-02-15 11:14:49,917 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 69 [2019-02-15 11:14:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:49,918 INFO L225 Difference]: With dead ends: 75 [2019-02-15 11:14:49,918 INFO L226 Difference]: Without dead ends: 74 [2019-02-15 11:14:49,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-02-15 11:14:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-02-15 11:14:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-02-15 11:14:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-02-15 11:14:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-02-15 11:14:49,922 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 69 [2019-02-15 11:14:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:49,922 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-02-15 11:14:49,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-02-15 11:14:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-02-15 11:14:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-02-15 11:14:49,923 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:49,923 INFO L402 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1] [2019-02-15 11:14:49,923 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash -544486516, now seen corresponding path program 23 times [2019-02-15 11:14:49,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:49,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:49,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:49,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:49,925 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:50,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:50,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:50,307 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:50,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:50,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:50,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:50,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:50,318 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:50,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-02-15 11:14:50,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:50,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:50,368 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 [2019-02-15 11:14:50,369 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:50,390 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:50,391 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:50,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:51,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:51,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 72 [2019-02-15 11:14:51,545 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:51,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-02-15 11:14:51,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-02-15 11:14:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-02-15 11:14:51,547 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 50 states. [2019-02-15 11:14:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:51,712 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-02-15 11:14:51,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-02-15 11:14:51,713 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 72 [2019-02-15 11:14:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:51,714 INFO L225 Difference]: With dead ends: 78 [2019-02-15 11:14:51,714 INFO L226 Difference]: Without dead ends: 77 [2019-02-15 11:14:51,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-02-15 11:14:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-02-15 11:14:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-02-15 11:14:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-02-15 11:14:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-02-15 11:14:51,718 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 72 [2019-02-15 11:14:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:51,719 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-02-15 11:14:51,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-02-15 11:14:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-02-15 11:14:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-02-15 11:14:51,719 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:51,719 INFO L402 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1] [2019-02-15 11:14:51,719 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:51,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1293720352, now seen corresponding path program 24 times [2019-02-15 11:14:51,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:51,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:51,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:51,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:51,721 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:52,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:52,146 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:52,146 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:52,146 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:52,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:52,146 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:52,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:52,154 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:52,179 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:52,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:52,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:52,189 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 [2019-02-15 11:14:52,189 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:52,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:52,198 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:52,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:53,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:53,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2019-02-15 11:14:53,646 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:53,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-02-15 11:14:53,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-02-15 11:14:53,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-02-15 11:14:53,647 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 52 states. [2019-02-15 11:14:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:53,895 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-02-15 11:14:53,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-02-15 11:14:53,895 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 75 [2019-02-15 11:14:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:53,896 INFO L225 Difference]: With dead ends: 81 [2019-02-15 11:14:53,896 INFO L226 Difference]: Without dead ends: 80 [2019-02-15 11:14:53,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-02-15 11:14:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-15 11:14:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-02-15 11:14:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-02-15 11:14:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-02-15 11:14:53,902 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 75 [2019-02-15 11:14:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:53,902 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-02-15 11:14:53,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-02-15 11:14:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-02-15 11:14:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-02-15 11:14:53,903 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:53,903 INFO L402 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1] [2019-02-15 11:14:53,903 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1813466356, now seen corresponding path program 25 times [2019-02-15 11:14:53,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:53,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:53,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:53,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:53,905 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:54,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:54,343 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:54,343 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:54,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:54,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:54,343 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:54,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:54,352 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:14:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:54,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:54,379 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 [2019-02-15 11:14:54,380 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:54,386 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:54,386 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:54,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:55,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:55,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 78 [2019-02-15 11:14:55,760 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:55,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-02-15 11:14:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-02-15 11:14:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-02-15 11:14:55,762 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 54 states. [2019-02-15 11:14:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:55,958 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-02-15 11:14:55,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-02-15 11:14:55,958 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 78 [2019-02-15 11:14:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:55,959 INFO L225 Difference]: With dead ends: 84 [2019-02-15 11:14:55,959 INFO L226 Difference]: Without dead ends: 83 [2019-02-15 11:14:55,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-02-15 11:14:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-02-15 11:14:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-02-15 11:14:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-02-15 11:14:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-02-15 11:14:55,964 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 78 [2019-02-15 11:14:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:55,964 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-02-15 11:14:55,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-02-15 11:14:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-02-15 11:14:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-02-15 11:14:55,965 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:55,965 INFO L402 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1] [2019-02-15 11:14:55,965 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1417446304, now seen corresponding path program 26 times [2019-02-15 11:14:55,965 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:55,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:55,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:14:55,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:55,966 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:56,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:56,416 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:56,416 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:56,417 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:56,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:56,417 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:56,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:14:56,426 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:14:56,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-02-15 11:14:56,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:56,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:56,485 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 [2019-02-15 11:14:56,485 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:56,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:56,494 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:56,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:14:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:57,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:14:57,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2019-02-15 11:14:57,928 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:14:57,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-02-15 11:14:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-02-15 11:14:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-02-15 11:14:57,929 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 56 states. [2019-02-15 11:14:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:14:58,096 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-02-15 11:14:58,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-02-15 11:14:58,097 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 81 [2019-02-15 11:14:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:14:58,098 INFO L225 Difference]: With dead ends: 87 [2019-02-15 11:14:58,098 INFO L226 Difference]: Without dead ends: 86 [2019-02-15 11:14:58,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-02-15 11:14:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-02-15 11:14:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-02-15 11:14:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-02-15 11:14:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-02-15 11:14:58,103 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 81 [2019-02-15 11:14:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:14:58,103 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-02-15 11:14:58,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-02-15 11:14:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-02-15 11:14:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-02-15 11:14:58,104 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:14:58,104 INFO L402 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1] [2019-02-15 11:14:58,104 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:14:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:14:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -975570292, now seen corresponding path program 27 times [2019-02-15 11:14:58,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:14:58,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:58,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:14:58,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:14:58,106 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:14:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:14:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:58,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:58,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:14:58,578 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:14:58,578 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:14:58,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:14:58,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:14:58,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:14:58,587 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:14:58,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:14:58,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:14:58,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:14:58,621 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 [2019-02-15 11:14:58,621 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:14:58,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:14:58,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:14:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:14:59,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:00,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:00,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 84 [2019-02-15 11:15:00,506 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:00,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-02-15 11:15:00,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-02-15 11:15:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-02-15 11:15:00,507 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 58 states. [2019-02-15 11:15:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:00,682 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-02-15 11:15:00,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-02-15 11:15:00,682 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 84 [2019-02-15 11:15:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:00,683 INFO L225 Difference]: With dead ends: 90 [2019-02-15 11:15:00,683 INFO L226 Difference]: Without dead ends: 89 [2019-02-15 11:15:00,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-02-15 11:15:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-02-15 11:15:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-02-15 11:15:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-02-15 11:15:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-02-15 11:15:00,688 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 84 [2019-02-15 11:15:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:00,688 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-02-15 11:15:00,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-02-15 11:15:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-02-15 11:15:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-02-15 11:15:00,689 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:00,689 INFO L402 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1] [2019-02-15 11:15:00,689 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash 829164576, now seen corresponding path program 28 times [2019-02-15 11:15:00,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:00,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:00,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:00,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:00,690 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:01,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:01,317 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:01,317 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:01,317 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:01,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:01,317 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:01,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:01,326 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:15:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:01,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:01,368 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 [2019-02-15 11:15:01,369 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:01,378 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:01,379 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:02,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:03,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:03,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2019-02-15 11:15:03,314 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:03,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-02-15 11:15:03,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-02-15 11:15:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-02-15 11:15:03,316 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 60 states. [2019-02-15 11:15:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:03,536 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-02-15 11:15:03,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-02-15 11:15:03,536 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 87 [2019-02-15 11:15:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:03,537 INFO L225 Difference]: With dead ends: 93 [2019-02-15 11:15:03,538 INFO L226 Difference]: Without dead ends: 92 [2019-02-15 11:15:03,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-02-15 11:15:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-02-15 11:15:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-02-15 11:15:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-02-15 11:15:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-02-15 11:15:03,544 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 87 [2019-02-15 11:15:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:03,544 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-02-15 11:15:03,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-02-15 11:15:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-02-15 11:15:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-02-15 11:15:03,545 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:03,545 INFO L402 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1] [2019-02-15 11:15:03,546 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1285005836, now seen corresponding path program 29 times [2019-02-15 11:15:03,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:03,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:03,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:03,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:03,547 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:04,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:04,322 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:04,322 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:04,323 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:04,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:04,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:04,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:15:04,332 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:15:04,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-02-15 11:15:04,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:04,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:04,404 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 [2019-02-15 11:15:04,404 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:04,417 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:04,418 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:05,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:06,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:06,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 90 [2019-02-15 11:15:06,143 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:06,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-02-15 11:15:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-02-15 11:15:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-02-15 11:15:06,145 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 62 states. [2019-02-15 11:15:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:06,327 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-02-15 11:15:06,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-02-15 11:15:06,327 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 90 [2019-02-15 11:15:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:06,328 INFO L225 Difference]: With dead ends: 96 [2019-02-15 11:15:06,328 INFO L226 Difference]: Without dead ends: 95 [2019-02-15 11:15:06,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-02-15 11:15:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-02-15 11:15:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-02-15 11:15:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-02-15 11:15:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-02-15 11:15:06,334 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 90 [2019-02-15 11:15:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:06,334 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-02-15 11:15:06,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-02-15 11:15:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-02-15 11:15:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-02-15 11:15:06,335 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:06,335 INFO L402 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1] [2019-02-15 11:15:06,335 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash 565392544, now seen corresponding path program 30 times [2019-02-15 11:15:06,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:06,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:06,336 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:06,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:06,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:06,885 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:06,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:06,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:06,886 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:06,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:15:06,896 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:15:06,923 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:15:06,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:06,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:06,930 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 [2019-02-15 11:15:06,930 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:06,939 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:06,940 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:07,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:08,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:08,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 93 [2019-02-15 11:15:08,798 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:08,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-02-15 11:15:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-02-15 11:15:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-02-15 11:15:08,799 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 64 states. [2019-02-15 11:15:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:09,043 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-02-15 11:15:09,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-02-15 11:15:09,044 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 93 [2019-02-15 11:15:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:09,044 INFO L225 Difference]: With dead ends: 99 [2019-02-15 11:15:09,044 INFO L226 Difference]: Without dead ends: 98 [2019-02-15 11:15:09,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-02-15 11:15:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-02-15 11:15:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-02-15 11:15:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-02-15 11:15:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-02-15 11:15:09,049 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 93 [2019-02-15 11:15:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:09,049 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-02-15 11:15:09,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-02-15 11:15:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-02-15 11:15:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-02-15 11:15:09,050 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:09,050 INFO L402 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1] [2019-02-15 11:15:09,051 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:09,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1252415092, now seen corresponding path program 31 times [2019-02-15 11:15:09,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:09,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:09,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:09,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:09,052 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:09,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:09,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:09,693 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:09,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:09,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:09,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:09,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:09,702 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:15:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:09,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:09,746 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 [2019-02-15 11:15:09,746 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:09,761 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:09,761 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:10,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:11,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:11,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 96 [2019-02-15 11:15:11,757 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:11,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-02-15 11:15:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-02-15 11:15:11,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-02-15 11:15:11,758 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 66 states. [2019-02-15 11:15:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:11,986 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-02-15 11:15:11,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-02-15 11:15:11,986 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 96 [2019-02-15 11:15:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:11,987 INFO L225 Difference]: With dead ends: 102 [2019-02-15 11:15:11,987 INFO L226 Difference]: Without dead ends: 101 [2019-02-15 11:15:11,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-02-15 11:15:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-02-15 11:15:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-02-15 11:15:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-02-15 11:15:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-02-15 11:15:11,992 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 96 [2019-02-15 11:15:11,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:11,992 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-02-15 11:15:11,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-02-15 11:15:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-02-15 11:15:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-02-15 11:15:11,993 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:11,993 INFO L402 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1] [2019-02-15 11:15:11,993 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -317063904, now seen corresponding path program 32 times [2019-02-15 11:15:11,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:11,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:11,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:11,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:11,995 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:12,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:12,582 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:12,582 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:12,583 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:12,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:12,583 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:12,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:15:12,592 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:15:12,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-02-15 11:15:12,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:12,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:12,672 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 [2019-02-15 11:15:12,672 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:12,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:12,681 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:13,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:15,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:15,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 99 [2019-02-15 11:15:15,136 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:15,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-02-15 11:15:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-02-15 11:15:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-02-15 11:15:15,137 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 68 states. [2019-02-15 11:15:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:15,379 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-02-15 11:15:15,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-02-15 11:15:15,380 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 99 [2019-02-15 11:15:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:15,381 INFO L225 Difference]: With dead ends: 105 [2019-02-15 11:15:15,381 INFO L226 Difference]: Without dead ends: 104 [2019-02-15 11:15:15,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-02-15 11:15:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-02-15 11:15:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-02-15 11:15:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-02-15 11:15:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-02-15 11:15:15,387 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 99 [2019-02-15 11:15:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:15,388 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-02-15 11:15:15,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-02-15 11:15:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-02-15 11:15:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-02-15 11:15:15,388 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:15,388 INFO L402 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1] [2019-02-15 11:15:15,389 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1017638644, now seen corresponding path program 33 times [2019-02-15 11:15:15,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:15,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:15,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:15,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:15,390 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:16,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:16,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:16,124 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:16,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:16,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:16,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:16,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:15:16,134 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:15:16,167 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:15:16,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:16,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:16,208 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 [2019-02-15 11:15:16,209 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:16,312 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:16,312 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:17,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:18,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:18,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 102 [2019-02-15 11:15:18,818 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:18,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-02-15 11:15:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-02-15 11:15:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-02-15 11:15:18,820 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 70 states. [2019-02-15 11:15:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:19,112 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-02-15 11:15:19,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-02-15 11:15:19,112 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 102 [2019-02-15 11:15:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:19,113 INFO L225 Difference]: With dead ends: 108 [2019-02-15 11:15:19,113 INFO L226 Difference]: Without dead ends: 107 [2019-02-15 11:15:19,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-02-15 11:15:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-02-15 11:15:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-02-15 11:15:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-02-15 11:15:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-02-15 11:15:19,118 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 102 [2019-02-15 11:15:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:19,118 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-02-15 11:15:19,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-02-15 11:15:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-02-15 11:15:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-02-15 11:15:19,119 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:19,119 INFO L402 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1] [2019-02-15 11:15:19,119 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1701340576, now seen corresponding path program 34 times [2019-02-15 11:15:19,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:19,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:19,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:19,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:19,120 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:19,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:19,898 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:19,898 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:19,898 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:19,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:19,898 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:19,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:19,907 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:15:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:19,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:19,943 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 [2019-02-15 11:15:19,943 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:19,955 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:19,955 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:20,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:22,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:22,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 105 [2019-02-15 11:15:22,256 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:22,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-02-15 11:15:22,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-02-15 11:15:22,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-02-15 11:15:22,258 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 72 states. [2019-02-15 11:15:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:22,491 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-02-15 11:15:22,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-02-15 11:15:22,491 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 105 [2019-02-15 11:15:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:22,492 INFO L225 Difference]: With dead ends: 111 [2019-02-15 11:15:22,492 INFO L226 Difference]: Without dead ends: 110 [2019-02-15 11:15:22,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-02-15 11:15:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-02-15 11:15:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-02-15 11:15:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-02-15 11:15:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-02-15 11:15:22,497 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 105 [2019-02-15 11:15:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:22,497 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-02-15 11:15:22,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-02-15 11:15:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-02-15 11:15:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-02-15 11:15:22,498 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:22,498 INFO L402 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1] [2019-02-15 11:15:22,498 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash -271918964, now seen corresponding path program 35 times [2019-02-15 11:15:22,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:22,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:22,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:22,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:22,499 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:23,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:23,796 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:23,796 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:23,796 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:23,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:23,796 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:23,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:15:23,804 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:15:23,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-02-15 11:15:23,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:23,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:23,919 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 [2019-02-15 11:15:23,919 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:23,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:23,930 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:25,005 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:26,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:26,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 108 [2019-02-15 11:15:26,613 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:26,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-02-15 11:15:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-02-15 11:15:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-02-15 11:15:26,615 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 74 states. [2019-02-15 11:15:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:26,907 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-02-15 11:15:26,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-02-15 11:15:26,907 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 108 [2019-02-15 11:15:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:26,908 INFO L225 Difference]: With dead ends: 114 [2019-02-15 11:15:26,908 INFO L226 Difference]: Without dead ends: 113 [2019-02-15 11:15:26,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-02-15 11:15:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-02-15 11:15:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-02-15 11:15:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-02-15 11:15:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-02-15 11:15:26,914 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 108 [2019-02-15 11:15:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:26,914 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-02-15 11:15:26,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-02-15 11:15:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-02-15 11:15:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-02-15 11:15:26,915 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:26,915 INFO L402 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1] [2019-02-15 11:15:26,916 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -429494752, now seen corresponding path program 36 times [2019-02-15 11:15:26,916 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:26,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:26,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:26,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:26,917 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:27,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:27,805 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:27,805 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:27,805 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:27,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:27,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:27,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:15:27,816 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:15:27,851 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:15:27,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:27,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:27,863 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 [2019-02-15 11:15:27,863 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:27,874 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:27,874 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:28,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:30,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:30,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 111 [2019-02-15 11:15:30,881 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:30,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-02-15 11:15:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-02-15 11:15:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-02-15 11:15:30,883 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 76 states. [2019-02-15 11:15:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:31,110 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-02-15 11:15:31,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-02-15 11:15:31,110 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 111 [2019-02-15 11:15:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:31,111 INFO L225 Difference]: With dead ends: 117 [2019-02-15 11:15:31,112 INFO L226 Difference]: Without dead ends: 116 [2019-02-15 11:15:31,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-02-15 11:15:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-02-15 11:15:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-02-15 11:15:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-02-15 11:15:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2019-02-15 11:15:31,116 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 111 [2019-02-15 11:15:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:31,117 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2019-02-15 11:15:31,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-02-15 11:15:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2019-02-15 11:15:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-02-15 11:15:31,117 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:31,118 INFO L402 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1] [2019-02-15 11:15:31,118 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -370540532, now seen corresponding path program 37 times [2019-02-15 11:15:31,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:31,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:31,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:31,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:31,119 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:31,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:31,908 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:31,908 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:31,909 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:31,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:31,909 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:31,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:31,917 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:15:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:31,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:31,968 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 [2019-02-15 11:15:31,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:31,977 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:31,978 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:32,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:35,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:35,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 114 [2019-02-15 11:15:35,028 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:35,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-02-15 11:15:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-02-15 11:15:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-02-15 11:15:35,030 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 78 states. [2019-02-15 11:15:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:35,328 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2019-02-15 11:15:35,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-02-15 11:15:35,328 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 114 [2019-02-15 11:15:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:35,330 INFO L225 Difference]: With dead ends: 120 [2019-02-15 11:15:35,330 INFO L226 Difference]: Without dead ends: 119 [2019-02-15 11:15:35,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-02-15 11:15:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-02-15 11:15:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-02-15 11:15:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-02-15 11:15:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2019-02-15 11:15:35,337 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 114 [2019-02-15 11:15:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:35,337 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2019-02-15 11:15:35,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-02-15 11:15:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2019-02-15 11:15:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-02-15 11:15:35,338 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:35,338 INFO L402 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1] [2019-02-15 11:15:35,338 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash -706996576, now seen corresponding path program 38 times [2019-02-15 11:15:35,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:35,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:35,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:35,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:35,339 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:39,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:39,498 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:39,498 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:39,498 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:39,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:39,499 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:39,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:15:39,507 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:15:39,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-02-15 11:15:39,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:39,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:39,626 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 [2019-02-15 11:15:39,626 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:39,637 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:39,637 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:40,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:42,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:42,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 117 [2019-02-15 11:15:42,726 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:42,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-02-15 11:15:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-02-15 11:15:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-02-15 11:15:42,728 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 80 states. [2019-02-15 11:15:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:43,077 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-02-15 11:15:43,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-02-15 11:15:43,078 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 117 [2019-02-15 11:15:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:43,079 INFO L225 Difference]: With dead ends: 123 [2019-02-15 11:15:43,079 INFO L226 Difference]: Without dead ends: 122 [2019-02-15 11:15:43,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-02-15 11:15:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-02-15 11:15:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-02-15 11:15:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-02-15 11:15:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-02-15 11:15:43,085 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 117 [2019-02-15 11:15:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:43,085 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-02-15 11:15:43,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-02-15 11:15:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-02-15 11:15:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-02-15 11:15:43,086 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:43,086 INFO L402 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1] [2019-02-15 11:15:43,086 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:43,086 INFO L82 PathProgramCache]: Analyzing trace with hash 384665484, now seen corresponding path program 39 times [2019-02-15 11:15:43,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:43,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:43,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:43,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:43,087 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:43,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:43,988 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:43,988 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:43,989 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:43,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:43,989 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:43,998 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:15:43,998 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:15:44,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:15:44,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:44,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:44,064 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 [2019-02-15 11:15:44,065 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:44,159 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:44,160 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:46,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:48,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:48,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 120 [2019-02-15 11:15:48,065 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:48,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-02-15 11:15:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-02-15 11:15:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-02-15 11:15:48,067 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 82 states. [2019-02-15 11:15:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:48,384 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2019-02-15 11:15:48,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-02-15 11:15:48,384 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 120 [2019-02-15 11:15:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:48,385 INFO L225 Difference]: With dead ends: 126 [2019-02-15 11:15:48,386 INFO L226 Difference]: Without dead ends: 125 [2019-02-15 11:15:48,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-02-15 11:15:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-02-15 11:15:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-02-15 11:15:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-02-15 11:15:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2019-02-15 11:15:48,390 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 120 [2019-02-15 11:15:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:48,390 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2019-02-15 11:15:48,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-02-15 11:15:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2019-02-15 11:15:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-02-15 11:15:48,391 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:48,391 INFO L402 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1] [2019-02-15 11:15:48,391 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 596729632, now seen corresponding path program 40 times [2019-02-15 11:15:48,392 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:48,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:48,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:50,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:50,561 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:50,561 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:50,562 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:50,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:50,562 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:50,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:50,570 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:15:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:50,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:50,611 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 [2019-02-15 11:15:50,611 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:50,619 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:50,619 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:51,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:53,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:53,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2019-02-15 11:15:53,714 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:53,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-02-15 11:15:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-02-15 11:15:53,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-02-15 11:15:53,717 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 84 states. [2019-02-15 11:15:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:54,070 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2019-02-15 11:15:54,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-02-15 11:15:54,071 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 123 [2019-02-15 11:15:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:54,072 INFO L225 Difference]: With dead ends: 129 [2019-02-15 11:15:54,072 INFO L226 Difference]: Without dead ends: 128 [2019-02-15 11:15:54,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-02-15 11:15:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-02-15 11:15:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-02-15 11:15:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-02-15 11:15:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2019-02-15 11:15:54,078 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 123 [2019-02-15 11:15:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:54,079 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2019-02-15 11:15:54,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-02-15 11:15:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2019-02-15 11:15:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-02-15 11:15:54,080 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:54,080 INFO L402 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1] [2019-02-15 11:15:54,080 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:54,081 INFO L82 PathProgramCache]: Analyzing trace with hash 302870284, now seen corresponding path program 41 times [2019-02-15 11:15:54,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:54,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:54,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:15:54,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:54,082 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:15:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:55,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:55,238 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:15:55,238 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:15:55,238 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:15:55,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:15:55,238 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:15:55,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:15:55,247 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:15:55,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-02-15 11:15:55,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:15:55,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:15:55,383 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 [2019-02-15 11:15:55,384 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:15:55,396 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:15:55,396 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:15:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:56,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:15:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:15:58,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:15:58,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 126 [2019-02-15 11:15:58,634 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:15:58,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-02-15 11:15:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-02-15 11:15:58,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-02-15 11:15:58,636 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 86 states. [2019-02-15 11:15:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:15:58,965 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2019-02-15 11:15:58,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-02-15 11:15:58,966 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 126 [2019-02-15 11:15:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:15:58,967 INFO L225 Difference]: With dead ends: 132 [2019-02-15 11:15:58,967 INFO L226 Difference]: Without dead ends: 131 [2019-02-15 11:15:58,968 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-02-15 11:15:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-02-15 11:15:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-02-15 11:15:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-02-15 11:15:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2019-02-15 11:15:58,973 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 126 [2019-02-15 11:15:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:15:58,974 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2019-02-15 11:15:58,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-02-15 11:15:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2019-02-15 11:15:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-02-15 11:15:58,975 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:15:58,975 INFO L402 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1] [2019-02-15 11:15:58,975 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:15:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:15:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash -917616736, now seen corresponding path program 42 times [2019-02-15 11:15:58,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:15:58,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:58,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:15:58,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:15:58,976 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:15:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:00,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:00,918 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:00,918 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:00,918 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:00,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:00,918 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:00,927 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:16:00,927 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:16:00,966 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:16:00,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:16:00,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:00,974 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 [2019-02-15 11:16:00,974 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:00,982 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:00,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:02,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:04,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:04,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 129 [2019-02-15 11:16:04,376 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:04,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-02-15 11:16:04,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-02-15 11:16:04,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-02-15 11:16:04,379 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 88 states. [2019-02-15 11:16:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:04,915 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2019-02-15 11:16:04,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-02-15 11:16:04,916 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 129 [2019-02-15 11:16:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:04,916 INFO L225 Difference]: With dead ends: 135 [2019-02-15 11:16:04,917 INFO L226 Difference]: Without dead ends: 134 [2019-02-15 11:16:04,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-02-15 11:16:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-02-15 11:16:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-02-15 11:16:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-02-15 11:16:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2019-02-15 11:16:04,924 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 129 [2019-02-15 11:16:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:04,925 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2019-02-15 11:16:04,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-02-15 11:16:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2019-02-15 11:16:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-02-15 11:16:04,926 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:04,926 INFO L402 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1] [2019-02-15 11:16:04,926 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash 746698380, now seen corresponding path program 43 times [2019-02-15 11:16:04,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:04,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:04,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:16:04,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:04,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:06,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:06,389 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:06,390 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:06,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:06,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:06,390 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:06,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:16:06,399 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:16:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:06,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:06,445 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 [2019-02-15 11:16:06,446 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:06,458 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:06,458 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:07,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:09,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:09,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 132 [2019-02-15 11:16:09,980 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:09,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-02-15 11:16:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-02-15 11:16:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-02-15 11:16:09,983 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 90 states. [2019-02-15 11:16:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:10,240 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2019-02-15 11:16:10,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-02-15 11:16:10,241 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 132 [2019-02-15 11:16:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:10,242 INFO L225 Difference]: With dead ends: 138 [2019-02-15 11:16:10,242 INFO L226 Difference]: Without dead ends: 137 [2019-02-15 11:16:10,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-02-15 11:16:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-02-15 11:16:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-02-15 11:16:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-02-15 11:16:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2019-02-15 11:16:10,247 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 132 [2019-02-15 11:16:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:10,248 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2019-02-15 11:16:10,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-02-15 11:16:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2019-02-15 11:16:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-02-15 11:16:10,248 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:10,248 INFO L402 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1] [2019-02-15 11:16:10,249 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:10,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1255854112, now seen corresponding path program 44 times [2019-02-15 11:16:10,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:10,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:10,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:16:10,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:10,250 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:11,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:11,459 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:11,459 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:11,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:11,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:11,459 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:11,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:16:11,469 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:16:11,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-02-15 11:16:11,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:16:11,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:11,604 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 [2019-02-15 11:16:11,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:11,613 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:11,613 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:12,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:15,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:15,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 135 [2019-02-15 11:16:15,300 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:15,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-02-15 11:16:15,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-02-15 11:16:15,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-02-15 11:16:15,302 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 92 states. [2019-02-15 11:16:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:15,656 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2019-02-15 11:16:15,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-02-15 11:16:15,658 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 135 [2019-02-15 11:16:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:15,659 INFO L225 Difference]: With dead ends: 141 [2019-02-15 11:16:15,659 INFO L226 Difference]: Without dead ends: 140 [2019-02-15 11:16:15,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-02-15 11:16:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-02-15 11:16:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-02-15 11:16:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-02-15 11:16:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2019-02-15 11:16:15,664 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 135 [2019-02-15 11:16:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:15,665 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2019-02-15 11:16:15,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-02-15 11:16:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2019-02-15 11:16:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-02-15 11:16:15,665 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:15,666 INFO L402 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1] [2019-02-15 11:16:15,666 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:15,666 INFO L82 PathProgramCache]: Analyzing trace with hash -310223348, now seen corresponding path program 45 times [2019-02-15 11:16:15,666 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:15,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:15,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:16:15,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:15,667 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:16,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:16,731 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:16,731 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:16,731 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:16,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:16,731 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:16,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:16:16,740 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:16:16,784 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:16:16,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:16:16,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:16,806 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 [2019-02-15 11:16:16,807 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:16,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:16,829 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:18,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:20,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:20,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 138 [2019-02-15 11:16:20,928 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:20,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-02-15 11:16:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-02-15 11:16:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-02-15 11:16:20,930 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 94 states. [2019-02-15 11:16:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:21,314 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2019-02-15 11:16:21,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-02-15 11:16:21,315 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 138 [2019-02-15 11:16:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:21,316 INFO L225 Difference]: With dead ends: 144 [2019-02-15 11:16:21,316 INFO L226 Difference]: Without dead ends: 143 [2019-02-15 11:16:21,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-02-15 11:16:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-02-15 11:16:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-02-15 11:16:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-02-15 11:16:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2019-02-15 11:16:21,322 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 138 [2019-02-15 11:16:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:21,323 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2019-02-15 11:16:21,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-02-15 11:16:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2019-02-15 11:16:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-02-15 11:16:21,324 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:21,324 INFO L402 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1] [2019-02-15 11:16:21,324 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash 905902240, now seen corresponding path program 46 times [2019-02-15 11:16:21,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:21,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:21,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:16:21,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:21,325 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:22,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:22,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:22,755 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:22,755 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:22,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:22,756 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:22,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:16:22,765 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:16:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:22,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:22,811 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 [2019-02-15 11:16:22,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:22,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:22,824 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:24,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:27,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:27,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 141 [2019-02-15 11:16:27,436 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:27,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-02-15 11:16:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-02-15 11:16:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-02-15 11:16:27,438 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 96 states. [2019-02-15 11:16:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:27,746 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2019-02-15 11:16:27,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-02-15 11:16:27,747 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 141 [2019-02-15 11:16:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:27,748 INFO L225 Difference]: With dead ends: 147 [2019-02-15 11:16:27,748 INFO L226 Difference]: Without dead ends: 146 [2019-02-15 11:16:27,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-02-15 11:16:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-02-15 11:16:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-02-15 11:16:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-02-15 11:16:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2019-02-15 11:16:27,753 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 141 [2019-02-15 11:16:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:27,753 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2019-02-15 11:16:27,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-02-15 11:16:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2019-02-15 11:16:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-02-15 11:16:27,754 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:27,755 INFO L402 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1] [2019-02-15 11:16:27,755 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1840814708, now seen corresponding path program 47 times [2019-02-15 11:16:27,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:27,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:27,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:16:27,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:27,756 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:29,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:29,069 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:29,069 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:29,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:29,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:29,069 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:29,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:16:29,078 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:16:29,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-02-15 11:16:29,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:16:29,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:29,240 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 [2019-02-15 11:16:29,241 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:29,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:29,331 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:30,660 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:33,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:33,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 144 [2019-02-15 11:16:33,760 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:33,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-02-15 11:16:33,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-02-15 11:16:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-02-15 11:16:33,762 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 98 states. [2019-02-15 11:16:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:34,097 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2019-02-15 11:16:34,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-02-15 11:16:34,097 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 144 [2019-02-15 11:16:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:34,099 INFO L225 Difference]: With dead ends: 150 [2019-02-15 11:16:34,099 INFO L226 Difference]: Without dead ends: 149 [2019-02-15 11:16:34,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-02-15 11:16:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-02-15 11:16:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-02-15 11:16:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-02-15 11:16:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2019-02-15 11:16:34,107 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 144 [2019-02-15 11:16:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:34,107 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2019-02-15 11:16:34,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-02-15 11:16:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2019-02-15 11:16:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-02-15 11:16:34,108 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:34,108 INFO L402 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1] [2019-02-15 11:16:34,109 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:34,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1568489184, now seen corresponding path program 48 times [2019-02-15 11:16:34,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:34,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:34,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:16:34,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:34,110 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:35,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:35,446 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:35,446 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:35,446 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:35,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:35,446 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:35,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:16:35,455 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:16:35,497 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:16:35,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:16:35,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:35,505 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 [2019-02-15 11:16:35,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:35,514 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:35,514 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:37,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:40,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:40,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 147 [2019-02-15 11:16:40,159 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:40,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-02-15 11:16:40,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-02-15 11:16:40,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-02-15 11:16:40,161 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 100 states. [2019-02-15 11:16:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:40,612 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2019-02-15 11:16:40,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-02-15 11:16:40,613 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 147 [2019-02-15 11:16:40,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:40,614 INFO L225 Difference]: With dead ends: 153 [2019-02-15 11:16:40,614 INFO L226 Difference]: Without dead ends: 152 [2019-02-15 11:16:40,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-02-15 11:16:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-02-15 11:16:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2019-02-15 11:16:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-02-15 11:16:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2019-02-15 11:16:40,620 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 147 [2019-02-15 11:16:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:40,620 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2019-02-15 11:16:40,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-02-15 11:16:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2019-02-15 11:16:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-02-15 11:16:40,621 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:40,621 INFO L402 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1] [2019-02-15 11:16:40,621 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1912025844, now seen corresponding path program 49 times [2019-02-15 11:16:40,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:40,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:40,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:16:40,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:40,622 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:42,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:42,150 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:42,150 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:42,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:42,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:42,150 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:42,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:16:42,159 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:16:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:42,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:42,232 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 [2019-02-15 11:16:42,233 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:42,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:42,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:43,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:47,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:47,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 150 [2019-02-15 11:16:47,144 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:47,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-02-15 11:16:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-02-15 11:16:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-02-15 11:16:47,146 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 102 states. [2019-02-15 11:16:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:47,497 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2019-02-15 11:16:47,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-02-15 11:16:47,497 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 150 [2019-02-15 11:16:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:47,499 INFO L225 Difference]: With dead ends: 156 [2019-02-15 11:16:47,499 INFO L226 Difference]: Without dead ends: 155 [2019-02-15 11:16:47,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-02-15 11:16:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-02-15 11:16:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-02-15 11:16:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-02-15 11:16:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2019-02-15 11:16:47,505 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 150 [2019-02-15 11:16:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:47,505 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2019-02-15 11:16:47,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-02-15 11:16:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2019-02-15 11:16:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-02-15 11:16:47,506 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:47,506 INFO L402 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1] [2019-02-15 11:16:47,506 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1305597536, now seen corresponding path program 50 times [2019-02-15 11:16:47,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:47,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:47,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:16:47,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:47,508 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:48,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:48,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:48,783 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:48,784 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:48,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:48,784 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:48,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:16:48,794 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:16:48,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-02-15 11:16:48,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:16:48,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:48,971 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 [2019-02-15 11:16:48,971 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:48,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:48,985 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:50,479 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:16:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:53,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:16:53,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2019-02-15 11:16:53,853 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:16:53,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-02-15 11:16:53,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-02-15 11:16:53,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-02-15 11:16:53,855 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 104 states. [2019-02-15 11:16:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:16:54,193 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2019-02-15 11:16:54,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-02-15 11:16:54,193 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 153 [2019-02-15 11:16:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:16:54,195 INFO L225 Difference]: With dead ends: 159 [2019-02-15 11:16:54,195 INFO L226 Difference]: Without dead ends: 158 [2019-02-15 11:16:54,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10397 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-02-15 11:16:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-02-15 11:16:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-02-15 11:16:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-02-15 11:16:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2019-02-15 11:16:54,199 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 153 [2019-02-15 11:16:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:16:54,200 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2019-02-15 11:16:54,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-02-15 11:16:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2019-02-15 11:16:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-02-15 11:16:54,200 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:16:54,201 INFO L402 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1] [2019-02-15 11:16:54,201 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:16:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:16:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash 167679116, now seen corresponding path program 51 times [2019-02-15 11:16:54,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:16:54,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:54,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:16:54,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:16:54,202 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:16:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:16:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:55,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:55,717 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:16:55,717 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:16:55,717 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:16:55,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:16:55,717 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:16:55,725 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:16:55,726 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:16:55,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:16:55,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:16:55,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:16:55,806 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 [2019-02-15 11:16:55,807 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:16:55,873 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:16:55,873 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:16:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:16:57,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:00,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:00,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 152 [2019-02-15 11:17:00,969 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:00,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-02-15 11:17:00,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-02-15 11:17:00,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-02-15 11:17:00,971 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 106 states. [2019-02-15 11:17:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:01,323 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2019-02-15 11:17:01,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-02-15 11:17:01,324 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 156 [2019-02-15 11:17:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:01,325 INFO L225 Difference]: With dead ends: 162 [2019-02-15 11:17:01,325 INFO L226 Difference]: Without dead ends: 161 [2019-02-15 11:17:01,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-02-15 11:17:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-02-15 11:17:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-02-15 11:17:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-02-15 11:17:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2019-02-15 11:17:01,331 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 156 [2019-02-15 11:17:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:01,332 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2019-02-15 11:17:01,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-02-15 11:17:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2019-02-15 11:17:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-02-15 11:17:01,333 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:01,333 INFO L402 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1] [2019-02-15 11:17:01,333 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash 281621024, now seen corresponding path program 52 times [2019-02-15 11:17:01,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:01,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:01,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:17:01,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:01,334 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:02,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:02,929 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:02,929 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:02,929 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:02,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:02,929 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:02,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:17:02,938 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:17:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:02,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:02,990 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 [2019-02-15 11:17:02,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:02,998 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:02,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:04,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:08,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:08,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2019-02-15 11:17:08,212 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:08,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-02-15 11:17:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-02-15 11:17:08,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-02-15 11:17:08,214 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 108 states. [2019-02-15 11:17:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:08,614 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2019-02-15 11:17:08,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-02-15 11:17:08,615 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 159 [2019-02-15 11:17:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:08,616 INFO L225 Difference]: With dead ends: 165 [2019-02-15 11:17:08,616 INFO L226 Difference]: Without dead ends: 164 [2019-02-15 11:17:08,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 210 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11391 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-02-15 11:17:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-02-15 11:17:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-02-15 11:17:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-02-15 11:17:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2019-02-15 11:17:08,620 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 159 [2019-02-15 11:17:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:08,620 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2019-02-15 11:17:08,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-02-15 11:17:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2019-02-15 11:17:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-02-15 11:17:08,621 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:08,621 INFO L402 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1] [2019-02-15 11:17:08,621 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1700838412, now seen corresponding path program 53 times [2019-02-15 11:17:08,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:08,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:08,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:17:08,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:08,622 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:09,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:09,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:09,942 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:09,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:09,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:09,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:09,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:17:09,952 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:17:10,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-02-15 11:17:10,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:17:10,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:10,170 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 [2019-02-15 11:17:10,171 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:10,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:10,208 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:12,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:15,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:15,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 154 [2019-02-15 11:17:15,986 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:15,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-02-15 11:17:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-02-15 11:17:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-02-15 11:17:15,988 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 110 states. [2019-02-15 11:17:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:16,390 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2019-02-15 11:17:16,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-02-15 11:17:16,391 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 162 [2019-02-15 11:17:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:16,392 INFO L225 Difference]: With dead ends: 168 [2019-02-15 11:17:16,392 INFO L226 Difference]: Without dead ends: 167 [2019-02-15 11:17:16,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 214 SyntacticMatches, 8 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11888 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-02-15 11:17:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-02-15 11:17:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2019-02-15 11:17:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-02-15 11:17:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2019-02-15 11:17:16,397 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 162 [2019-02-15 11:17:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:16,398 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2019-02-15 11:17:16,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-02-15 11:17:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2019-02-15 11:17:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-02-15 11:17:16,399 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:16,399 INFO L402 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1] [2019-02-15 11:17:16,399 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:16,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1947982496, now seen corresponding path program 54 times [2019-02-15 11:17:16,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:16,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:16,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:17:16,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:16,400 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:18,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:18,100 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:18,100 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:18,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:18,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:18,100 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:18,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:17:18,108 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:17:18,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:17:18,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:17:18,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:18,181 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 [2019-02-15 11:17:18,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:18,234 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:18,235 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:19,946 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:23,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:23,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 155 [2019-02-15 11:17:23,356 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:23,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-02-15 11:17:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-02-15 11:17:23,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-02-15 11:17:23,358 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 112 states. [2019-02-15 11:17:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:23,739 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2019-02-15 11:17:23,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-02-15 11:17:23,739 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 165 [2019-02-15 11:17:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:23,740 INFO L225 Difference]: With dead ends: 171 [2019-02-15 11:17:23,740 INFO L226 Difference]: Without dead ends: 170 [2019-02-15 11:17:23,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12385 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-02-15 11:17:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-02-15 11:17:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-02-15 11:17:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-02-15 11:17:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2019-02-15 11:17:23,744 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 165 [2019-02-15 11:17:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:23,745 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2019-02-15 11:17:23,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-02-15 11:17:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2019-02-15 11:17:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-02-15 11:17:23,745 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:23,745 INFO L402 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1] [2019-02-15 11:17:23,746 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1251523700, now seen corresponding path program 55 times [2019-02-15 11:17:23,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:23,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:23,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:17:23,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:23,747 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:25,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:25,309 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:25,309 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:25,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:25,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:25,309 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:25,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:17:25,319 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:17:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:25,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:25,376 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 [2019-02-15 11:17:25,376 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:25,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:25,387 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:27,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:30,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:30,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 156 [2019-02-15 11:17:30,833 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:30,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-02-15 11:17:30,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-02-15 11:17:30,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-02-15 11:17:30,835 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 114 states. [2019-02-15 11:17:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:31,204 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2019-02-15 11:17:31,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-02-15 11:17:31,204 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 168 [2019-02-15 11:17:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:31,205 INFO L225 Difference]: With dead ends: 174 [2019-02-15 11:17:31,205 INFO L226 Difference]: Without dead ends: 173 [2019-02-15 11:17:31,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 222 SyntacticMatches, 12 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-02-15 11:17:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-02-15 11:17:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2019-02-15 11:17:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-02-15 11:17:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2019-02-15 11:17:31,209 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 168 [2019-02-15 11:17:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:31,209 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2019-02-15 11:17:31,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-02-15 11:17:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2019-02-15 11:17:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-02-15 11:17:31,210 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:31,210 INFO L402 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1] [2019-02-15 11:17:31,210 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash 468591392, now seen corresponding path program 56 times [2019-02-15 11:17:31,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:31,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:31,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:17:31,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:31,211 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:33,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:33,120 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:33,120 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:33,120 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:33,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:33,120 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:33,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:17:33,129 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:17:33,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-02-15 11:17:33,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:17:33,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:33,329 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 [2019-02-15 11:17:33,330 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:33,340 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:33,340 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:35,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:38,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:38,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 157 [2019-02-15 11:17:38,787 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:38,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-02-15 11:17:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-02-15 11:17:38,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-02-15 11:17:38,789 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 116 states. [2019-02-15 11:17:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:39,175 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2019-02-15 11:17:39,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-02-15 11:17:39,175 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 171 [2019-02-15 11:17:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:39,177 INFO L225 Difference]: With dead ends: 177 [2019-02-15 11:17:39,177 INFO L226 Difference]: Without dead ends: 176 [2019-02-15 11:17:39,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 226 SyntacticMatches, 14 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13379 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-02-15 11:17:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-02-15 11:17:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2019-02-15 11:17:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-02-15 11:17:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2019-02-15 11:17:39,181 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 171 [2019-02-15 11:17:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:39,181 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2019-02-15 11:17:39,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-02-15 11:17:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2019-02-15 11:17:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-02-15 11:17:39,182 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:39,182 INFO L402 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1] [2019-02-15 11:17:39,183 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1162488588, now seen corresponding path program 57 times [2019-02-15 11:17:39,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:39,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:39,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:17:39,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:39,184 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:40,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:40,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:40,728 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:40,728 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:40,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:40,728 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:40,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:17:40,736 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:17:40,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:17:40,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:17:40,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:40,805 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 [2019-02-15 11:17:40,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:40,815 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:40,815 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:43,046 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:46,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:46,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 158 [2019-02-15 11:17:46,425 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:46,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-02-15 11:17:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-02-15 11:17:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-02-15 11:17:46,428 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 118 states. [2019-02-15 11:17:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:46,851 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2019-02-15 11:17:46,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-02-15 11:17:46,852 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 174 [2019-02-15 11:17:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:46,854 INFO L225 Difference]: With dead ends: 180 [2019-02-15 11:17:46,854 INFO L226 Difference]: Without dead ends: 179 [2019-02-15 11:17:46,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 230 SyntacticMatches, 16 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13876 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-02-15 11:17:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-02-15 11:17:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-02-15 11:17:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-02-15 11:17:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2019-02-15 11:17:46,860 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 174 [2019-02-15 11:17:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:46,860 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2019-02-15 11:17:46,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-02-15 11:17:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2019-02-15 11:17:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-02-15 11:17:46,861 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:46,861 INFO L402 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1] [2019-02-15 11:17:46,862 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1376258976, now seen corresponding path program 58 times [2019-02-15 11:17:46,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:46,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:46,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:17:46,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:46,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:48,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:48,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:48,863 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:48,863 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:48,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:48,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:48,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:17:48,875 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:17:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:48,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:48,932 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 [2019-02-15 11:17:48,932 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:48,943 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:48,943 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:51,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:17:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:54,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:17:54,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 159 [2019-02-15 11:17:54,870 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:17:54,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2019-02-15 11:17:54,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2019-02-15 11:17:54,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-02-15 11:17:54,872 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 120 states. [2019-02-15 11:17:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:17:55,293 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2019-02-15 11:17:55,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-02-15 11:17:55,293 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 177 [2019-02-15 11:17:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:17:55,294 INFO L225 Difference]: With dead ends: 183 [2019-02-15 11:17:55,294 INFO L226 Difference]: Without dead ends: 182 [2019-02-15 11:17:55,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 234 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14373 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-02-15 11:17:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-02-15 11:17:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-02-15 11:17:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-02-15 11:17:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2019-02-15 11:17:55,300 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 177 [2019-02-15 11:17:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:17:55,300 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2019-02-15 11:17:55,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2019-02-15 11:17:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2019-02-15 11:17:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-02-15 11:17:55,301 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:17:55,302 INFO L402 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1] [2019-02-15 11:17:55,302 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:17:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:17:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash 373387916, now seen corresponding path program 59 times [2019-02-15 11:17:55,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:17:55,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:55,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:17:55,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:17:55,303 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:17:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:17:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:57,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:57,010 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:17:57,010 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:17:57,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:17:57,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:17:57,010 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:17:57,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:17:57,019 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:17:57,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-02-15 11:17:57,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:17:57,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:17:57,423 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 [2019-02-15 11:17:57,423 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:17:57,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:17:57,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:17:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:17:59,715 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:18:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:03,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:18:03,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 160 [2019-02-15 11:18:03,597 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:18:03,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2019-02-15 11:18:03,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2019-02-15 11:18:03,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-02-15 11:18:03,599 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 122 states. [2019-02-15 11:18:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:18:03,976 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2019-02-15 11:18:03,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-02-15 11:18:03,976 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 180 [2019-02-15 11:18:03,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:18:03,978 INFO L225 Difference]: With dead ends: 186 [2019-02-15 11:18:03,978 INFO L226 Difference]: Without dead ends: 185 [2019-02-15 11:18:03,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 238 SyntacticMatches, 20 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14870 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-02-15 11:18:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-02-15 11:18:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-02-15 11:18:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-02-15 11:18:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2019-02-15 11:18:03,984 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 180 [2019-02-15 11:18:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:18:03,984 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2019-02-15 11:18:03,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2019-02-15 11:18:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2019-02-15 11:18:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-02-15 11:18:03,985 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:18:03,986 INFO L402 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1] [2019-02-15 11:18:03,986 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:18:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:18:03,986 INFO L82 PathProgramCache]: Analyzing trace with hash -365849568, now seen corresponding path program 60 times [2019-02-15 11:18:03,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:18:03,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:03,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:18:03,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:03,987 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:18:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:05,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:05,717 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:18:05,718 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:18:05,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:18:05,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:05,718 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:18:05,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:18:05,728 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:18:05,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:18:05,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:18:05,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:18:05,799 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 [2019-02-15 11:18:05,799 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:18:05,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:18:05,825 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:18:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:07,892 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:18:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:11,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:18:11,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 161 [2019-02-15 11:18:11,587 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:18:11,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-02-15 11:18:11,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-02-15 11:18:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-02-15 11:18:11,589 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 124 states. [2019-02-15 11:18:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:18:12,020 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2019-02-15 11:18:12,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-02-15 11:18:12,021 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 183 [2019-02-15 11:18:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:18:12,022 INFO L225 Difference]: With dead ends: 189 [2019-02-15 11:18:12,022 INFO L226 Difference]: Without dead ends: 188 [2019-02-15 11:18:12,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 242 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15367 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-02-15 11:18:12,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-02-15 11:18:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2019-02-15 11:18:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-02-15 11:18:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2019-02-15 11:18:12,028 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 183 [2019-02-15 11:18:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:18:12,028 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2019-02-15 11:18:12,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-02-15 11:18:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2019-02-15 11:18:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-02-15 11:18:12,029 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:18:12,029 INFO L402 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1] [2019-02-15 11:18:12,030 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:18:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:18:12,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1602558476, now seen corresponding path program 61 times [2019-02-15 11:18:12,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:18:12,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:12,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:18:12,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:12,031 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:18:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:14,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:14,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:18:14,054 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:18:14,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:18:14,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:14,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:18:14,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:18:14,062 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:18:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:14,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:18:14,120 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 [2019-02-15 11:18:14,120 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:18:14,133 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:18:14,133 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:18:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:16,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:18:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:20,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:18:20,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 162 [2019-02-15 11:18:20,106 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:18:20,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-02-15 11:18:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-02-15 11:18:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-02-15 11:18:20,108 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 126 states. [2019-02-15 11:18:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:18:20,604 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2019-02-15 11:18:20,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-02-15 11:18:20,604 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 186 [2019-02-15 11:18:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:18:20,606 INFO L225 Difference]: With dead ends: 192 [2019-02-15 11:18:20,606 INFO L226 Difference]: Without dead ends: 191 [2019-02-15 11:18:20,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 246 SyntacticMatches, 24 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15864 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-02-15 11:18:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-02-15 11:18:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-02-15 11:18:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-02-15 11:18:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2019-02-15 11:18:20,610 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 186 [2019-02-15 11:18:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:18:20,610 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2019-02-15 11:18:20,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-02-15 11:18:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2019-02-15 11:18:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-02-15 11:18:20,611 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:18:20,611 INFO L402 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1] [2019-02-15 11:18:20,611 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:18:20,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:18:20,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1036862304, now seen corresponding path program 62 times [2019-02-15 11:18:20,611 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:18:20,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:20,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:18:20,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:20,612 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:18:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:22,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:22,466 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:18:22,466 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:18:22,466 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:18:22,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:22,467 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:18:22,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:18:22,476 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:18:22,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2019-02-15 11:18:22,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:18:22,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:18:22,719 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 [2019-02-15 11:18:22,719 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:18:22,730 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:18:22,730 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:18:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:25,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:18:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:28,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:18:28,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 163 [2019-02-15 11:18:28,880 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:18:28,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2019-02-15 11:18:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2019-02-15 11:18:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-02-15 11:18:28,883 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 128 states. [2019-02-15 11:18:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:18:29,377 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2019-02-15 11:18:29,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-02-15 11:18:29,378 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 189 [2019-02-15 11:18:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:18:29,379 INFO L225 Difference]: With dead ends: 195 [2019-02-15 11:18:29,379 INFO L226 Difference]: Without dead ends: 194 [2019-02-15 11:18:29,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 250 SyntacticMatches, 26 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16361 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-02-15 11:18:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-02-15 11:18:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2019-02-15 11:18:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-02-15 11:18:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2019-02-15 11:18:29,384 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 189 [2019-02-15 11:18:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:18:29,384 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2019-02-15 11:18:29,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2019-02-15 11:18:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2019-02-15 11:18:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-02-15 11:18:29,385 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:18:29,385 INFO L402 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1] [2019-02-15 11:18:29,385 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:18:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:18:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 239935884, now seen corresponding path program 63 times [2019-02-15 11:18:29,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:18:29,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:29,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:18:29,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:29,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:18:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:31,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:31,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:18:31,303 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:18:31,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:18:31,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:31,303 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:18:31,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:18:31,312 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:18:31,370 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:18:31,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:18:31,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:18:31,379 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 [2019-02-15 11:18:31,379 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:18:31,397 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:18:31,397 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:18:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:33,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:18:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:37,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:18:37,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 164 [2019-02-15 11:18:37,686 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:18:37,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-02-15 11:18:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-02-15 11:18:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-02-15 11:18:37,689 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 130 states. [2019-02-15 11:18:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:18:38,196 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2019-02-15 11:18:38,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-02-15 11:18:38,197 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 192 [2019-02-15 11:18:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:18:38,198 INFO L225 Difference]: With dead ends: 198 [2019-02-15 11:18:38,198 INFO L226 Difference]: Without dead ends: 197 [2019-02-15 11:18:38,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 254 SyntacticMatches, 28 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16858 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-02-15 11:18:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-02-15 11:18:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-02-15 11:18:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-02-15 11:18:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2019-02-15 11:18:38,205 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 192 [2019-02-15 11:18:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:18:38,205 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2019-02-15 11:18:38,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-02-15 11:18:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2019-02-15 11:18:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-02-15 11:18:38,206 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:18:38,207 INFO L402 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1] [2019-02-15 11:18:38,207 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:18:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:18:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1104381216, now seen corresponding path program 64 times [2019-02-15 11:18:38,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:18:38,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:38,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:18:38,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:38,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:18:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:40,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:40,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:18:40,356 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:18:40,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:18:40,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:40,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:18:40,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:18:40,368 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:18:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:40,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:18:40,433 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 [2019-02-15 11:18:40,434 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:18:40,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:18:40,448 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:18:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:42,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:18:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:46,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:18:46,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 165 [2019-02-15 11:18:46,629 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:18:46,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-02-15 11:18:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-02-15 11:18:46,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-02-15 11:18:46,631 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 132 states. [2019-02-15 11:18:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:18:47,078 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2019-02-15 11:18:47,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-02-15 11:18:47,078 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 195 [2019-02-15 11:18:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:18:47,080 INFO L225 Difference]: With dead ends: 201 [2019-02-15 11:18:47,080 INFO L226 Difference]: Without dead ends: 200 [2019-02-15 11:18:47,081 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 258 SyntacticMatches, 30 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17355 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-02-15 11:18:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-02-15 11:18:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2019-02-15 11:18:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-02-15 11:18:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2019-02-15 11:18:47,087 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 195 [2019-02-15 11:18:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:18:47,087 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2019-02-15 11:18:47,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-02-15 11:18:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2019-02-15 11:18:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-02-15 11:18:47,088 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:18:47,089 INFO L402 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1] [2019-02-15 11:18:47,089 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:18:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:18:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1171360012, now seen corresponding path program 65 times [2019-02-15 11:18:47,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:18:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:47,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:18:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:47,090 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:18:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:49,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:49,245 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:18:49,245 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:18:49,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:18:49,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:49,246 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:18:49,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:18:49,253 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:18:49,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2019-02-15 11:18:49,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:18:49,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:18:49,533 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 [2019-02-15 11:18:49,533 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:18:49,543 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:18:49,543 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:18:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:51,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:18:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:55,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:18:55,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 166 [2019-02-15 11:18:55,875 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:18:55,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2019-02-15 11:18:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2019-02-15 11:18:55,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-02-15 11:18:55,877 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 134 states. [2019-02-15 11:18:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:18:56,320 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2019-02-15 11:18:56,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-02-15 11:18:56,321 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 198 [2019-02-15 11:18:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:18:56,322 INFO L225 Difference]: With dead ends: 204 [2019-02-15 11:18:56,322 INFO L226 Difference]: Without dead ends: 203 [2019-02-15 11:18:56,323 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 262 SyntacticMatches, 32 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17852 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-02-15 11:18:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-02-15 11:18:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2019-02-15 11:18:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-02-15 11:18:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2019-02-15 11:18:56,326 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 198 [2019-02-15 11:18:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:18:56,327 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2019-02-15 11:18:56,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2019-02-15 11:18:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2019-02-15 11:18:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-02-15 11:18:56,328 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:18:56,328 INFO L402 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1] [2019-02-15 11:18:56,328 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:18:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:18:56,328 INFO L82 PathProgramCache]: Analyzing trace with hash -623120992, now seen corresponding path program 66 times [2019-02-15 11:18:56,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:18:56,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:56,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:18:56,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:18:56,329 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:18:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:18:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:18:58,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:58,384 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:18:58,385 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:18:58,385 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:18:58,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:18:58,385 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:18:58,392 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:18:58,393 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:18:58,456 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:18:58,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:18:58,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:18:58,467 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 [2019-02-15 11:18:58,467 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:18:58,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:18:58,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:19:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:01,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:19:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:05,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:19:05,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 167 [2019-02-15 11:19:05,110 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:19:05,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-02-15 11:19:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-02-15 11:19:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-02-15 11:19:05,112 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 136 states. [2019-02-15 11:19:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:19:05,607 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2019-02-15 11:19:05,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-02-15 11:19:05,608 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 201 [2019-02-15 11:19:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:19:05,609 INFO L225 Difference]: With dead ends: 207 [2019-02-15 11:19:05,609 INFO L226 Difference]: Without dead ends: 206 [2019-02-15 11:19:05,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 266 SyntacticMatches, 34 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18349 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-02-15 11:19:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-02-15 11:19:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2019-02-15 11:19:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-02-15 11:19:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2019-02-15 11:19:05,614 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 201 [2019-02-15 11:19:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:19:05,614 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2019-02-15 11:19:05,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-02-15 11:19:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2019-02-15 11:19:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-02-15 11:19:05,615 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:19:05,615 INFO L402 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1] [2019-02-15 11:19:05,616 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:19:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:19:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash -548777844, now seen corresponding path program 67 times [2019-02-15 11:19:05,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:19:05,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:05,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:19:05,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:05,617 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:19:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:07,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:07,699 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:19:07,699 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:19:07,700 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:19:07,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:07,700 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:19:07,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:19:07,711 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:19:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:07,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:19:07,796 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 [2019-02-15 11:19:07,796 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:19:07,807 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:19:07,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:19:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:10,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:19:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:14,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:19:14,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 168 [2019-02-15 11:19:14,361 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:19:14,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-02-15 11:19:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-02-15 11:19:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-02-15 11:19:14,363 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 138 states. [2019-02-15 11:19:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:19:14,843 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2019-02-15 11:19:14,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-02-15 11:19:14,843 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 204 [2019-02-15 11:19:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:19:14,844 INFO L225 Difference]: With dead ends: 210 [2019-02-15 11:19:14,844 INFO L226 Difference]: Without dead ends: 209 [2019-02-15 11:19:14,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 270 SyntacticMatches, 36 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18846 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-02-15 11:19:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-02-15 11:19:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2019-02-15 11:19:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-02-15 11:19:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2019-02-15 11:19:14,849 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 204 [2019-02-15 11:19:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:19:14,849 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2019-02-15 11:19:14,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2019-02-15 11:19:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2019-02-15 11:19:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-02-15 11:19:14,850 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:19:14,850 INFO L402 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1] [2019-02-15 11:19:14,850 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:19:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:19:14,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1995180512, now seen corresponding path program 68 times [2019-02-15 11:19:14,851 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:19:14,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:14,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:19:14,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:14,851 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:19:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:17,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:17,082 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:19:17,082 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:19:17,082 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:19:17,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:17,083 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:19:17,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:19:17,091 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:19:17,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2019-02-15 11:19:17,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:19:17,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:19:17,384 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 [2019-02-15 11:19:17,384 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:19:17,400 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:19:17,401 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:19:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:20,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:19:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:23,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:19:23,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 169 [2019-02-15 11:19:23,960 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:19:23,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2019-02-15 11:19:23,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2019-02-15 11:19:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-02-15 11:19:23,963 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 140 states. [2019-02-15 11:19:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:19:24,511 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2019-02-15 11:19:24,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-02-15 11:19:24,511 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 207 [2019-02-15 11:19:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:19:24,512 INFO L225 Difference]: With dead ends: 213 [2019-02-15 11:19:24,513 INFO L226 Difference]: Without dead ends: 212 [2019-02-15 11:19:24,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 274 SyntacticMatches, 38 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19343 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-02-15 11:19:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-02-15 11:19:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-02-15 11:19:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-02-15 11:19:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2019-02-15 11:19:24,520 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 207 [2019-02-15 11:19:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:19:24,520 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2019-02-15 11:19:24,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2019-02-15 11:19:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2019-02-15 11:19:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-02-15 11:19:24,521 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:19:24,522 INFO L402 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1] [2019-02-15 11:19:24,522 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:19:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:19:24,522 INFO L82 PathProgramCache]: Analyzing trace with hash -370182132, now seen corresponding path program 69 times [2019-02-15 11:19:24,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:19:24,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:24,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:19:24,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:24,523 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:19:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:27,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:27,060 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:19:27,060 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:19:27,060 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:19:27,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:27,060 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:19:27,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:19:27,068 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:19:27,133 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:19:27,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:19:27,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:19:27,143 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 [2019-02-15 11:19:27,143 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:19:27,156 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:19:27,156 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:19:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:29,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:19:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:33,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:19:33,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2019-02-15 11:19:33,901 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:19:33,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-02-15 11:19:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-02-15 11:19:33,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-02-15 11:19:33,903 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 142 states. [2019-02-15 11:19:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:19:34,379 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2019-02-15 11:19:34,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-02-15 11:19:34,380 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 210 [2019-02-15 11:19:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:19:34,381 INFO L225 Difference]: With dead ends: 216 [2019-02-15 11:19:34,381 INFO L226 Difference]: Without dead ends: 215 [2019-02-15 11:19:34,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 278 SyntacticMatches, 40 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19840 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-02-15 11:19:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-02-15 11:19:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-02-15 11:19:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-02-15 11:19:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2019-02-15 11:19:34,388 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 210 [2019-02-15 11:19:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:19:34,389 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2019-02-15 11:19:34,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2019-02-15 11:19:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2019-02-15 11:19:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-02-15 11:19:34,390 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:19:34,390 INFO L402 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1] [2019-02-15 11:19:34,390 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:19:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:19:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1380163232, now seen corresponding path program 70 times [2019-02-15 11:19:34,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:19:34,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:34,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:19:34,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:34,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:19:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:36,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:36,915 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:19:36,916 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:19:36,916 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:19:36,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:36,916 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:19:36,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:19:36,924 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:19:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:36,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:19:36,997 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 [2019-02-15 11:19:36,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:19:37,012 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:19:37,012 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:19:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:39,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:19:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:44,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:19:44,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 171 [2019-02-15 11:19:44,092 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:19:44,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2019-02-15 11:19:44,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2019-02-15 11:19:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-02-15 11:19:44,095 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 144 states. [2019-02-15 11:19:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:19:44,552 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2019-02-15 11:19:44,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-02-15 11:19:44,553 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 213 [2019-02-15 11:19:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:19:44,554 INFO L225 Difference]: With dead ends: 219 [2019-02-15 11:19:44,554 INFO L226 Difference]: Without dead ends: 218 [2019-02-15 11:19:44,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 282 SyntacticMatches, 42 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20337 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-02-15 11:19:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-02-15 11:19:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-02-15 11:19:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-02-15 11:19:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2019-02-15 11:19:44,560 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 213 [2019-02-15 11:19:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:19:44,560 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2019-02-15 11:19:44,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2019-02-15 11:19:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2019-02-15 11:19:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-02-15 11:19:44,561 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:19:44,562 INFO L402 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1] [2019-02-15 11:19:44,562 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:19:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:19:44,562 INFO L82 PathProgramCache]: Analyzing trace with hash 720961420, now seen corresponding path program 71 times [2019-02-15 11:19:44,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:19:44,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:44,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:19:44,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:44,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:19:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:47,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:47,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:19:47,205 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:19:47,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:19:47,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:47,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:19:47,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:19:47,213 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:19:47,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2019-02-15 11:19:47,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:19:47,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:19:47,531 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 [2019-02-15 11:19:47,531 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:19:47,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:19:47,541 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:19:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:50,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:19:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:54,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:19:54,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 172 [2019-02-15 11:19:54,623 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:19:54,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-02-15 11:19:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-02-15 11:19:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-02-15 11:19:54,626 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 146 states. [2019-02-15 11:19:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:19:55,121 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2019-02-15 11:19:55,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-02-15 11:19:55,121 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 216 [2019-02-15 11:19:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:19:55,123 INFO L225 Difference]: With dead ends: 222 [2019-02-15 11:19:55,123 INFO L226 Difference]: Without dead ends: 221 [2019-02-15 11:19:55,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 286 SyntacticMatches, 44 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20834 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-02-15 11:19:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-02-15 11:19:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2019-02-15 11:19:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-02-15 11:19:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2019-02-15 11:19:55,129 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 216 [2019-02-15 11:19:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:19:55,129 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2019-02-15 11:19:55,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2019-02-15 11:19:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2019-02-15 11:19:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-02-15 11:19:55,130 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:19:55,130 INFO L402 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1] [2019-02-15 11:19:55,130 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:19:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:19:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash -969742560, now seen corresponding path program 72 times [2019-02-15 11:19:55,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:19:55,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:55,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:19:55,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:19:55,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:19:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:19:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:19:57,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:57,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:19:57,503 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:19:57,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:19:57,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:19:57,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:19:57,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:19:57,511 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:19:57,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:19:57,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:19:57,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:19:57,588 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 [2019-02-15 11:19:57,588 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:19:57,600 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:19:57,600 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:20:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:00,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:20:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:04,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:20:04,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 173 [2019-02-15 11:20:04,774 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:20:04,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-02-15 11:20:04,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-02-15 11:20:04,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-02-15 11:20:04,776 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 148 states. [2019-02-15 11:20:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:20:05,254 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2019-02-15 11:20:05,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-02-15 11:20:05,254 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 219 [2019-02-15 11:20:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:20:05,256 INFO L225 Difference]: With dead ends: 225 [2019-02-15 11:20:05,256 INFO L226 Difference]: Without dead ends: 224 [2019-02-15 11:20:05,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 290 SyntacticMatches, 46 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21331 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-02-15 11:20:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-02-15 11:20:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2019-02-15 11:20:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-02-15 11:20:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2019-02-15 11:20:05,261 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 219 [2019-02-15 11:20:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:20:05,262 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2019-02-15 11:20:05,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-02-15 11:20:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2019-02-15 11:20:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-02-15 11:20:05,262 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:20:05,263 INFO L402 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1] [2019-02-15 11:20:05,263 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:20:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:20:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1650530548, now seen corresponding path program 73 times [2019-02-15 11:20:05,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:20:05,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:05,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:20:05,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:05,264 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:20:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:20:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:08,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:08,102 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:20:08,102 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:20:08,102 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:20:08,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:08,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:20:08,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:20:08,112 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:20:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:20:08,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:20:08,180 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 [2019-02-15 11:20:08,180 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:20:08,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:20:08,192 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:20:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:11,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:20:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:15,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:20:15,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 174 [2019-02-15 11:20:15,396 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:20:15,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2019-02-15 11:20:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2019-02-15 11:20:15,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-02-15 11:20:15,398 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 150 states. [2019-02-15 11:20:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:20:15,928 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2019-02-15 11:20:15,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-02-15 11:20:15,928 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 222 [2019-02-15 11:20:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:20:15,929 INFO L225 Difference]: With dead ends: 228 [2019-02-15 11:20:15,929 INFO L226 Difference]: Without dead ends: 227 [2019-02-15 11:20:15,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 294 SyntacticMatches, 48 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21828 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-02-15 11:20:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-02-15 11:20:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2019-02-15 11:20:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-02-15 11:20:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2019-02-15 11:20:15,936 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 222 [2019-02-15 11:20:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:20:15,936 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2019-02-15 11:20:15,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2019-02-15 11:20:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2019-02-15 11:20:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-02-15 11:20:15,938 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:20:15,938 INFO L402 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1] [2019-02-15 11:20:15,938 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:20:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:20:15,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2125057952, now seen corresponding path program 74 times [2019-02-15 11:20:15,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:20:15,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:15,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:20:15,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:15,939 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:20:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:20:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:18,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:18,741 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:20:18,741 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:20:18,741 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:20:18,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:18,741 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:20:18,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:20:18,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:20:19,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2019-02-15 11:20:19,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:20:19,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:20:19,063 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 [2019-02-15 11:20:19,063 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:20:19,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:20:19,072 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:20:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:22,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:20:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:26,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:20:26,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 175 [2019-02-15 11:20:26,422 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:20:26,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2019-02-15 11:20:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2019-02-15 11:20:26,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-02-15 11:20:26,425 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 152 states. [2019-02-15 11:20:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:20:27,031 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2019-02-15 11:20:27,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-02-15 11:20:27,032 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 225 [2019-02-15 11:20:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:20:27,033 INFO L225 Difference]: With dead ends: 231 [2019-02-15 11:20:27,033 INFO L226 Difference]: Without dead ends: 230 [2019-02-15 11:20:27,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 298 SyntacticMatches, 50 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-02-15 11:20:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-02-15 11:20:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2019-02-15 11:20:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-02-15 11:20:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2019-02-15 11:20:27,040 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 225 [2019-02-15 11:20:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:20:27,040 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2019-02-15 11:20:27,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2019-02-15 11:20:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2019-02-15 11:20:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-02-15 11:20:27,042 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:20:27,042 INFO L402 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1] [2019-02-15 11:20:27,042 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:20:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:20:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash -216453492, now seen corresponding path program 75 times [2019-02-15 11:20:27,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:20:27,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:27,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:20:27,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:27,043 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:20:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:20:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:29,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:29,712 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:20:29,712 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:20:29,712 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:20:29,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:29,712 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:20:29,720 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:20:29,720 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:20:29,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:20:29,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:20:29,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:20:29,802 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 [2019-02-15 11:20:29,802 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:20:29,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:20:29,812 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:20:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:33,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:20:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:37,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:20:37,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 176 [2019-02-15 11:20:37,316 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:20:37,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-02-15 11:20:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-02-15 11:20:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-02-15 11:20:37,319 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 154 states. [2019-02-15 11:20:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:20:37,947 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2019-02-15 11:20:37,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-02-15 11:20:37,948 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 228 [2019-02-15 11:20:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:20:37,949 INFO L225 Difference]: With dead ends: 234 [2019-02-15 11:20:37,949 INFO L226 Difference]: Without dead ends: 233 [2019-02-15 11:20:37,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 302 SyntacticMatches, 52 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22822 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-02-15 11:20:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-02-15 11:20:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2019-02-15 11:20:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-02-15 11:20:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2019-02-15 11:20:37,954 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 228 [2019-02-15 11:20:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:20:37,955 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2019-02-15 11:20:37,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-02-15 11:20:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2019-02-15 11:20:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-02-15 11:20:37,956 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:20:37,956 INFO L402 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1] [2019-02-15 11:20:37,956 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:20:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:20:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1620027360, now seen corresponding path program 76 times [2019-02-15 11:20:37,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:20:37,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:37,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:20:37,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:37,957 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:20:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:20:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:40,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:40,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:20:40,675 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:20:40,675 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:20:40,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:40,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:20:40,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:20:40,683 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:20:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:20:40,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:20:40,758 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 [2019-02-15 11:20:40,759 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:20:40,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:20:40,777 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:20:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:44,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:20:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:48,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:20:48,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 177 [2019-02-15 11:20:48,555 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:20:48,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2019-02-15 11:20:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2019-02-15 11:20:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-02-15 11:20:48,557 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 156 states. [2019-02-15 11:20:49,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:20:49,099 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2019-02-15 11:20:49,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-02-15 11:20:49,100 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 231 [2019-02-15 11:20:49,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:20:49,101 INFO L225 Difference]: With dead ends: 237 [2019-02-15 11:20:49,102 INFO L226 Difference]: Without dead ends: 236 [2019-02-15 11:20:49,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 306 SyntacticMatches, 54 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23319 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-02-15 11:20:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-02-15 11:20:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2019-02-15 11:20:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-02-15 11:20:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2019-02-15 11:20:49,108 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 231 [2019-02-15 11:20:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:20:49,108 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2019-02-15 11:20:49,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2019-02-15 11:20:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2019-02-15 11:20:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-02-15 11:20:49,109 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:20:49,109 INFO L402 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1] [2019-02-15 11:20:49,109 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:20:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:20:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash 312464908, now seen corresponding path program 77 times [2019-02-15 11:20:49,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:20:49,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:49,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:20:49,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:20:49,110 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:20:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:20:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:51,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:51,897 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:20:51,897 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:20:51,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:20:51,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:20:51,897 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:20:51,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:20:51,905 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:20:52,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2019-02-15 11:20:52,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:20:52,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:20:52,284 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 [2019-02-15 11:20:52,284 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:20:52,294 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:20:52,294 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:20:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:55,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:20:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:20:59,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:20:59,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 178 [2019-02-15 11:20:59,934 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:20:59,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2019-02-15 11:20:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2019-02-15 11:20:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-02-15 11:20:59,936 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 158 states. [2019-02-15 11:21:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:21:00,574 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2019-02-15 11:21:00,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-02-15 11:21:00,574 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 234 [2019-02-15 11:21:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:21:00,575 INFO L225 Difference]: With dead ends: 240 [2019-02-15 11:21:00,575 INFO L226 Difference]: Without dead ends: 239 [2019-02-15 11:21:00,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 310 SyntacticMatches, 56 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23816 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-02-15 11:21:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-02-15 11:21:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2019-02-15 11:21:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-02-15 11:21:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2019-02-15 11:21:00,580 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 234 [2019-02-15 11:21:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:21:00,580 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2019-02-15 11:21:00,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2019-02-15 11:21:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2019-02-15 11:21:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-02-15 11:21:00,581 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:21:00,581 INFO L402 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1] [2019-02-15 11:21:00,582 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:21:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:21:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1447985312, now seen corresponding path program 78 times [2019-02-15 11:21:00,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:21:00,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:00,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:21:00,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:00,583 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:21:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:21:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:03,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:03,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:21:03,797 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:21:03,798 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:21:03,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:03,798 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:21:03,806 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:21:03,807 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:21:03,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:21:03,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:21:03,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:21:03,892 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 [2019-02-15 11:21:03,893 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:21:03,903 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:21:03,903 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:21:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:07,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:21:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:11,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:21:11,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 179 [2019-02-15 11:21:11,584 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:21:11,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2019-02-15 11:21:11,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2019-02-15 11:21:11,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-02-15 11:21:11,586 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 160 states. [2019-02-15 11:21:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:21:12,164 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2019-02-15 11:21:12,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-02-15 11:21:12,165 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 237 [2019-02-15 11:21:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:21:12,166 INFO L225 Difference]: With dead ends: 243 [2019-02-15 11:21:12,166 INFO L226 Difference]: Without dead ends: 242 [2019-02-15 11:21:12,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 314 SyntacticMatches, 58 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24313 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-02-15 11:21:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-02-15 11:21:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2019-02-15 11:21:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-02-15 11:21:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2019-02-15 11:21:12,173 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 237 [2019-02-15 11:21:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:21:12,174 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2019-02-15 11:21:12,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2019-02-15 11:21:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2019-02-15 11:21:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-02-15 11:21:12,175 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:21:12,175 INFO L402 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1] [2019-02-15 11:21:12,175 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:21:12,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:21:12,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1721049716, now seen corresponding path program 79 times [2019-02-15 11:21:12,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:21:12,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:12,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:21:12,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:12,177 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:21:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:21:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:15,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:15,361 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:21:15,361 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:21:15,361 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:21:15,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:15,361 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:21:15,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:21:15,369 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:21:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:21:15,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:21:15,444 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 [2019-02-15 11:21:15,444 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:21:15,457 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:21:15,457 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:21:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:19,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:21:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:23,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:21:23,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 180 [2019-02-15 11:21:23,496 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:21:23,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2019-02-15 11:21:23,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2019-02-15 11:21:23,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-02-15 11:21:23,498 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 162 states. [2019-02-15 11:21:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:21:24,093 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2019-02-15 11:21:24,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-02-15 11:21:24,094 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 240 [2019-02-15 11:21:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:21:24,095 INFO L225 Difference]: With dead ends: 246 [2019-02-15 11:21:24,095 INFO L226 Difference]: Without dead ends: 245 [2019-02-15 11:21:24,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 318 SyntacticMatches, 60 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24810 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-02-15 11:21:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-02-15 11:21:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2019-02-15 11:21:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-02-15 11:21:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2019-02-15 11:21:24,101 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 240 [2019-02-15 11:21:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:21:24,102 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2019-02-15 11:21:24,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2019-02-15 11:21:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2019-02-15 11:21:24,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-02-15 11:21:24,103 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:21:24,103 INFO L402 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1] [2019-02-15 11:21:24,103 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:21:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:21:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1527531808, now seen corresponding path program 80 times [2019-02-15 11:21:24,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:21:24,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:24,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:21:24,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:24,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:21:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:21:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:27,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:27,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:21:27,307 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:21:27,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:21:27,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:27,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:21:27,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:21:27,316 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:21:27,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-02-15 11:21:27,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:21:27,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:21:27,735 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 [2019-02-15 11:21:27,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:21:27,743 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:21:27,743 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:21:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:31,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:21:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:35,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:21:35,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 181 [2019-02-15 11:21:35,825 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:21:35,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2019-02-15 11:21:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2019-02-15 11:21:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-02-15 11:21:35,828 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 164 states. [2019-02-15 11:21:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:21:36,410 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2019-02-15 11:21:36,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-02-15 11:21:36,410 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 243 [2019-02-15 11:21:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:21:36,411 INFO L225 Difference]: With dead ends: 249 [2019-02-15 11:21:36,411 INFO L226 Difference]: Without dead ends: 248 [2019-02-15 11:21:36,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 322 SyntacticMatches, 62 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25307 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-02-15 11:21:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-02-15 11:21:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2019-02-15 11:21:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2019-02-15 11:21:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2019-02-15 11:21:36,418 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 243 [2019-02-15 11:21:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:21:36,418 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2019-02-15 11:21:36,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2019-02-15 11:21:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2019-02-15 11:21:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-02-15 11:21:36,420 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:21:36,420 INFO L402 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1] [2019-02-15 11:21:36,420 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:21:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:21:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1521632524, now seen corresponding path program 81 times [2019-02-15 11:21:36,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:21:36,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:36,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:21:36,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:36,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:21:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:21:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:39,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:39,802 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:21:39,802 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:21:39,802 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:21:39,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:39,802 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:21:39,810 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:21:39,810 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:21:39,890 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:21:39,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:21:39,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:21:39,900 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 [2019-02-15 11:21:39,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:21:39,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:21:39,911 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:21:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:43,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:21:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:47,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:21:47,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 182 [2019-02-15 11:21:47,824 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:21:47,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2019-02-15 11:21:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2019-02-15 11:21:47,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-02-15 11:21:47,827 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 166 states. [2019-02-15 11:21:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:21:48,468 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2019-02-15 11:21:48,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-02-15 11:21:48,468 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 246 [2019-02-15 11:21:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:21:48,469 INFO L225 Difference]: With dead ends: 252 [2019-02-15 11:21:48,469 INFO L226 Difference]: Without dead ends: 251 [2019-02-15 11:21:48,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 326 SyntacticMatches, 64 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25804 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-02-15 11:21:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-02-15 11:21:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2019-02-15 11:21:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-02-15 11:21:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2019-02-15 11:21:48,474 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 246 [2019-02-15 11:21:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:21:48,475 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2019-02-15 11:21:48,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2019-02-15 11:21:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2019-02-15 11:21:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-02-15 11:21:48,475 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:21:48,476 INFO L402 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1] [2019-02-15 11:21:48,476 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:21:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:21:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1869722016, now seen corresponding path program 82 times [2019-02-15 11:21:48,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:21:48,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:48,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:21:48,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:21:48,477 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:21:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:21:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:51,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:51,684 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:21:51,684 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:21:51,684 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:21:51,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:21:51,684 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:21:51,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:21:51,694 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:21:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:21:51,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:21:51,771 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 [2019-02-15 11:21:51,771 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:21:51,782 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:21:51,782 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:21:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:21:55,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:22:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:00,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:22:00,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 183 [2019-02-15 11:22:00,143 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:22:00,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2019-02-15 11:22:00,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2019-02-15 11:22:00,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-02-15 11:22:00,147 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 168 states. [2019-02-15 11:22:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:22:00,736 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2019-02-15 11:22:00,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-02-15 11:22:00,736 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 249 [2019-02-15 11:22:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:22:00,737 INFO L225 Difference]: With dead ends: 255 [2019-02-15 11:22:00,737 INFO L226 Difference]: Without dead ends: 254 [2019-02-15 11:22:00,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 330 SyntacticMatches, 66 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26301 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-02-15 11:22:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-02-15 11:22:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2019-02-15 11:22:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2019-02-15 11:22:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2019-02-15 11:22:00,743 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 249 [2019-02-15 11:22:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:22:00,743 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2019-02-15 11:22:00,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2019-02-15 11:22:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2019-02-15 11:22:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-02-15 11:22:00,744 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:22:00,744 INFO L402 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1] [2019-02-15 11:22:00,744 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:22:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:22:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -542241652, now seen corresponding path program 83 times [2019-02-15 11:22:00,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:22:00,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:00,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:22:00,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:00,745 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:22:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:22:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:04,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:04,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:22:04,233 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:22:04,233 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:22:04,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:04,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:22:04,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:22:04,242 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:22:04,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-02-15 11:22:04,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:22:04,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:22:04,686 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 [2019-02-15 11:22:04,686 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:22:04,696 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:22:04,696 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:22:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:08,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:22:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:12,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:22:12,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 184 [2019-02-15 11:22:12,904 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:22:12,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2019-02-15 11:22:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2019-02-15 11:22:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-02-15 11:22:12,907 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 170 states. [2019-02-15 11:22:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:22:13,509 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2019-02-15 11:22:13,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-02-15 11:22:13,510 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 252 [2019-02-15 11:22:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:22:13,511 INFO L225 Difference]: With dead ends: 258 [2019-02-15 11:22:13,511 INFO L226 Difference]: Without dead ends: 257 [2019-02-15 11:22:13,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 334 SyntacticMatches, 68 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26798 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-02-15 11:22:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-02-15 11:22:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2019-02-15 11:22:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-02-15 11:22:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2019-02-15 11:22:13,517 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 252 [2019-02-15 11:22:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:22:13,517 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2019-02-15 11:22:13,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2019-02-15 11:22:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2019-02-15 11:22:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-02-15 11:22:13,518 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:22:13,519 INFO L402 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1] [2019-02-15 11:22:13,519 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:22:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:22:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash -549012960, now seen corresponding path program 84 times [2019-02-15 11:22:13,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:22:13,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:13,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:22:13,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:13,520 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:22:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:22:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:17,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:17,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:22:17,055 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:22:17,055 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:22:17,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:17,055 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:22:17,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:22:17,065 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:22:17,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:22:17,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:22:17,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:22:17,162 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 [2019-02-15 11:22:17,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:22:17,172 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:22:17,172 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:22:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:21,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:22:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:25,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:22:25,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 185 [2019-02-15 11:22:25,726 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:22:25,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2019-02-15 11:22:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2019-02-15 11:22:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-02-15 11:22:25,728 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 172 states. [2019-02-15 11:22:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:22:26,375 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2019-02-15 11:22:26,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-02-15 11:22:26,375 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 255 [2019-02-15 11:22:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:22:26,377 INFO L225 Difference]: With dead ends: 261 [2019-02-15 11:22:26,377 INFO L226 Difference]: Without dead ends: 260 [2019-02-15 11:22:26,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 338 SyntacticMatches, 70 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27295 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-02-15 11:22:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-02-15 11:22:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2019-02-15 11:22:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-02-15 11:22:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2019-02-15 11:22:26,383 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 255 [2019-02-15 11:22:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:22:26,384 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2019-02-15 11:22:26,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2019-02-15 11:22:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2019-02-15 11:22:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-02-15 11:22:26,385 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:22:26,385 INFO L402 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1] [2019-02-15 11:22:26,386 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:22:26,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:22:26,386 INFO L82 PathProgramCache]: Analyzing trace with hash -409586676, now seen corresponding path program 85 times [2019-02-15 11:22:26,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:22:26,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:26,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:22:26,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:26,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:22:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:22:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:29,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:29,978 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:22:29,978 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:22:29,978 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:22:29,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:29,978 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:22:29,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:22:29,987 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:22:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:22:30,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:22:30,064 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 [2019-02-15 11:22:30,064 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:22:30,078 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:22:30,078 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:22:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:34,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:22:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:38,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:22:38,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 186 [2019-02-15 11:22:38,162 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:22:38,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2019-02-15 11:22:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2019-02-15 11:22:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-02-15 11:22:38,166 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 174 states. [2019-02-15 11:22:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:22:38,850 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2019-02-15 11:22:38,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-02-15 11:22:38,850 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 258 [2019-02-15 11:22:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:22:38,851 INFO L225 Difference]: With dead ends: 264 [2019-02-15 11:22:38,852 INFO L226 Difference]: Without dead ends: 263 [2019-02-15 11:22:38,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 342 SyntacticMatches, 72 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27792 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-02-15 11:22:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-02-15 11:22:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2019-02-15 11:22:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2019-02-15 11:22:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2019-02-15 11:22:38,857 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 258 [2019-02-15 11:22:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:22:38,857 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2019-02-15 11:22:38,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2019-02-15 11:22:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2019-02-15 11:22:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-02-15 11:22:38,858 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:22:38,859 INFO L402 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1] [2019-02-15 11:22:38,859 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:22:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:22:38,859 INFO L82 PathProgramCache]: Analyzing trace with hash 5464736, now seen corresponding path program 86 times [2019-02-15 11:22:38,859 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:22:38,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:38,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:22:38,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:38,860 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:22:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:22:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:42,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:42,386 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:22:42,386 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:22:42,386 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:22:42,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:42,386 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:22:42,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:22:42,394 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:22:42,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2019-02-15 11:22:42,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:22:42,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:22:42,861 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 [2019-02-15 11:22:42,861 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:22:42,873 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:22:42,873 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:22:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:47,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:22:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:51,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:22:51,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 187 [2019-02-15 11:22:51,661 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:22:51,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2019-02-15 11:22:51,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2019-02-15 11:22:51,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-02-15 11:22:51,664 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 176 states. [2019-02-15 11:22:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:22:52,364 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2019-02-15 11:22:52,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-02-15 11:22:52,364 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 261 [2019-02-15 11:22:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:22:52,365 INFO L225 Difference]: With dead ends: 267 [2019-02-15 11:22:52,365 INFO L226 Difference]: Without dead ends: 266 [2019-02-15 11:22:52,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 346 SyntacticMatches, 74 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28289 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-02-15 11:22:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-02-15 11:22:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2019-02-15 11:22:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2019-02-15 11:22:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2019-02-15 11:22:52,373 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 261 [2019-02-15 11:22:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:22:52,373 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2019-02-15 11:22:52,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2019-02-15 11:22:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2019-02-15 11:22:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-02-15 11:22:52,374 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:22:52,375 INFO L402 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1] [2019-02-15 11:22:52,375 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:22:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:22:52,375 INFO L82 PathProgramCache]: Analyzing trace with hash -408765556, now seen corresponding path program 87 times [2019-02-15 11:22:52,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:22:52,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:52,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:22:52,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:22:52,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:22:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:22:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:22:56,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:56,070 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:22:56,070 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:22:56,070 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:22:56,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:22:56,070 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:22:56,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:22:56,079 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:22:56,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:22:56,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:22:56,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:22:56,177 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 [2019-02-15 11:22:56,177 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:22:56,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:22:56,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:23:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:00,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:23:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:04,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:23:04,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 188 [2019-02-15 11:23:04,765 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:23:04,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2019-02-15 11:23:04,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2019-02-15 11:23:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-02-15 11:23:04,768 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 178 states. [2019-02-15 11:23:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:23:05,484 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2019-02-15 11:23:05,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-02-15 11:23:05,484 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 264 [2019-02-15 11:23:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:23:05,486 INFO L225 Difference]: With dead ends: 270 [2019-02-15 11:23:05,486 INFO L226 Difference]: Without dead ends: 269 [2019-02-15 11:23:05,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 350 SyntacticMatches, 76 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28786 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-02-15 11:23:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-02-15 11:23:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2019-02-15 11:23:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-02-15 11:23:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2019-02-15 11:23:05,492 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 264 [2019-02-15 11:23:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:23:05,493 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2019-02-15 11:23:05,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2019-02-15 11:23:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2019-02-15 11:23:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-02-15 11:23:05,494 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:23:05,494 INFO L402 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1] [2019-02-15 11:23:05,494 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:23:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:23:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353120, now seen corresponding path program 88 times [2019-02-15 11:23:05,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:23:05,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:05,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:23:05,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:05,495 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:23:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:23:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:09,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:09,001 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:23:09,001 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:23:09,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:23:09,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:09,001 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:23:09,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:23:09,011 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:23:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:23:09,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:23:09,092 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 [2019-02-15 11:23:09,092 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:23:09,106 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:23:09,106 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:23:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:13,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:23:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:18,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:23:18,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 189 [2019-02-15 11:23:18,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:23:18,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2019-02-15 11:23:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2019-02-15 11:23:18,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-02-15 11:23:18,083 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 180 states. [2019-02-15 11:23:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:23:18,860 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2019-02-15 11:23:18,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-02-15 11:23:18,861 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 267 [2019-02-15 11:23:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:23:18,862 INFO L225 Difference]: With dead ends: 273 [2019-02-15 11:23:18,862 INFO L226 Difference]: Without dead ends: 272 [2019-02-15 11:23:18,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 354 SyntacticMatches, 78 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29283 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-02-15 11:23:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-02-15 11:23:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2019-02-15 11:23:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2019-02-15 11:23:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2019-02-15 11:23:18,868 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 267 [2019-02-15 11:23:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:23:18,868 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2019-02-15 11:23:18,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2019-02-15 11:23:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2019-02-15 11:23:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-02-15 11:23:18,869 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:23:18,869 INFO L402 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1] [2019-02-15 11:23:18,869 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:23:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:23:18,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1962171636, now seen corresponding path program 89 times [2019-02-15 11:23:18,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:23:18,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:18,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:23:18,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:18,870 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:23:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:23:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:22,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:22,705 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:23:22,705 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:23:22,705 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:23:22,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:22,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:23:22,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:23:22,715 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:23:23,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2019-02-15 11:23:23,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:23:23,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:23:23,222 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 [2019-02-15 11:23:23,222 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:23:23,231 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:23:23,232 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:23:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:27,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:23:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:32,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:23:32,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 190 [2019-02-15 11:23:32,324 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:23:32,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2019-02-15 11:23:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2019-02-15 11:23:32,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-02-15 11:23:32,327 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 182 states. [2019-02-15 11:23:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:23:33,062 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2019-02-15 11:23:33,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-02-15 11:23:33,062 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 270 [2019-02-15 11:23:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:23:33,064 INFO L225 Difference]: With dead ends: 276 [2019-02-15 11:23:33,064 INFO L226 Difference]: Without dead ends: 275 [2019-02-15 11:23:33,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 358 SyntacticMatches, 80 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29780 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-02-15 11:23:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-02-15 11:23:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2019-02-15 11:23:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-02-15 11:23:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 274 transitions. [2019-02-15 11:23:33,070 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 274 transitions. Word has length 270 [2019-02-15 11:23:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:23:33,071 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 274 transitions. [2019-02-15 11:23:33,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2019-02-15 11:23:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 274 transitions. [2019-02-15 11:23:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-02-15 11:23:33,072 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:23:33,072 INFO L402 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1] [2019-02-15 11:23:33,072 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:23:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:23:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -550268000, now seen corresponding path program 90 times [2019-02-15 11:23:33,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:23:33,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:33,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:23:33,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:33,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:23:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:23:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:36,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:36,901 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:23:36,901 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:23:36,901 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:23:36,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:36,901 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:23:36,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:23:36,910 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:23:37,000 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:23:37,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:23:37,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:23:37,012 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 [2019-02-15 11:23:37,012 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:23:37,021 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:23:37,021 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:23:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:41,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:23:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:45,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:23:45,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 191 [2019-02-15 11:23:45,954 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:23:45,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2019-02-15 11:23:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2019-02-15 11:23:45,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-02-15 11:23:45,957 INFO L87 Difference]: Start difference. First operand 274 states and 274 transitions. Second operand 184 states. [2019-02-15 11:23:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:23:46,747 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2019-02-15 11:23:46,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-02-15 11:23:46,747 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 273 [2019-02-15 11:23:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:23:46,749 INFO L225 Difference]: With dead ends: 279 [2019-02-15 11:23:46,749 INFO L226 Difference]: Without dead ends: 278 [2019-02-15 11:23:46,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 362 SyntacticMatches, 82 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30277 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-02-15 11:23:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-02-15 11:23:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2019-02-15 11:23:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-02-15 11:23:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2019-02-15 11:23:46,755 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 273 [2019-02-15 11:23:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:23:46,755 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2019-02-15 11:23:46,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2019-02-15 11:23:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2019-02-15 11:23:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-02-15 11:23:46,756 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:23:46,756 INFO L402 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1] [2019-02-15 11:23:46,756 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:23:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:23:46,757 INFO L82 PathProgramCache]: Analyzing trace with hash 856222348, now seen corresponding path program 91 times [2019-02-15 11:23:46,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:23:46,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:46,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:23:46,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:23:46,757 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:23:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:23:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:50,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:50,452 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:23:50,452 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:23:50,452 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:23:50,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:23:50,452 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:23:50,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:23:50,479 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:23:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:23:50,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:23:50,564 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 [2019-02-15 11:23:50,564 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:23:50,574 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:23:50,574 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:23:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:55,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:23:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:23:59,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:23:59,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 192 [2019-02-15 11:23:59,892 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:23:59,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2019-02-15 11:23:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2019-02-15 11:23:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-02-15 11:23:59,896 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 186 states. [2019-02-15 11:24:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:24:00,614 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2019-02-15 11:24:00,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-02-15 11:24:00,614 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 276 [2019-02-15 11:24:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:24:00,616 INFO L225 Difference]: With dead ends: 282 [2019-02-15 11:24:00,616 INFO L226 Difference]: Without dead ends: 281 [2019-02-15 11:24:00,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 366 SyntacticMatches, 84 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30774 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-02-15 11:24:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-02-15 11:24:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2019-02-15 11:24:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-02-15 11:24:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2019-02-15 11:24:00,623 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 276 [2019-02-15 11:24:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:24:00,623 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2019-02-15 11:24:00,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2019-02-15 11:24:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2019-02-15 11:24:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-02-15 11:24:00,624 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:24:00,624 INFO L402 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1] [2019-02-15 11:24:00,624 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:24:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:24:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash -90760160, now seen corresponding path program 92 times [2019-02-15 11:24:00,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:24:00,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:00,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:24:00,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:00,625 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:24:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:24:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:04,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:04,886 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:24:04,886 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:24:04,886 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:24:04,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:04,886 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:24:04,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:24:04,895 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:24:05,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2019-02-15 11:24:05,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:24:05,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:24:05,461 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 [2019-02-15 11:24:05,461 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:24:05,472 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:24:05,472 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:24:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:10,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:24:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:14,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:24:14,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 193 [2019-02-15 11:24:14,715 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:24:14,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2019-02-15 11:24:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2019-02-15 11:24:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-02-15 11:24:14,718 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 188 states. [2019-02-15 11:24:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:24:15,508 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2019-02-15 11:24:15,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-02-15 11:24:15,509 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 279 [2019-02-15 11:24:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:24:15,510 INFO L225 Difference]: With dead ends: 285 [2019-02-15 11:24:15,510 INFO L226 Difference]: Without dead ends: 284 [2019-02-15 11:24:15,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 370 SyntacticMatches, 86 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31271 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-02-15 11:24:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-02-15 11:24:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2019-02-15 11:24:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2019-02-15 11:24:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2019-02-15 11:24:15,516 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 279 [2019-02-15 11:24:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:24:15,516 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2019-02-15 11:24:15,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2019-02-15 11:24:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2019-02-15 11:24:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-02-15 11:24:15,517 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:24:15,517 INFO L402 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1] [2019-02-15 11:24:15,518 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:24:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:24:15,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1993511436, now seen corresponding path program 93 times [2019-02-15 11:24:15,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:24:15,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:15,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:24:15,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:15,519 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:24:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:24:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:19,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:19,670 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:24:19,670 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:24:19,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:24:19,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:19,670 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:24:19,683 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:24:19,684 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:24:19,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:24:19,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:24:19,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:24:19,799 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 [2019-02-15 11:24:19,799 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:24:19,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:24:19,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:24:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:24,753 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:24:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:29,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:24:29,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 194 [2019-02-15 11:24:29,255 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:24:29,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2019-02-15 11:24:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2019-02-15 11:24:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-02-15 11:24:29,257 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 190 states. [2019-02-15 11:24:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:24:30,041 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2019-02-15 11:24:30,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-02-15 11:24:30,041 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 282 [2019-02-15 11:24:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:24:30,043 INFO L225 Difference]: With dead ends: 288 [2019-02-15 11:24:30,043 INFO L226 Difference]: Without dead ends: 287 [2019-02-15 11:24:30,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 374 SyntacticMatches, 88 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31768 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-02-15 11:24:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-02-15 11:24:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2019-02-15 11:24:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2019-02-15 11:24:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2019-02-15 11:24:30,049 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 282 [2019-02-15 11:24:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:24:30,049 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2019-02-15 11:24:30,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2019-02-15 11:24:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2019-02-15 11:24:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-02-15 11:24:30,050 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:24:30,051 INFO L402 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1] [2019-02-15 11:24:30,051 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:24:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:24:30,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2108537696, now seen corresponding path program 94 times [2019-02-15 11:24:30,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:24:30,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:30,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:24:30,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:30,052 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:24:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:24:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:34,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:34,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:24:34,255 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:24:34,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:24:34,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:34,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:24:34,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:24:34,265 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:24:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:24:34,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:24:34,359 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 [2019-02-15 11:24:34,359 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:24:34,369 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:24:34,369 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:24:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:39,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:24:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:43,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:24:43,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 195 [2019-02-15 11:24:43,674 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:24:43,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-02-15 11:24:43,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-02-15 11:24:43,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-02-15 11:24:43,679 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 192 states. [2019-02-15 11:24:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:24:44,388 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2019-02-15 11:24:44,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-02-15 11:24:44,389 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 285 [2019-02-15 11:24:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:24:44,391 INFO L225 Difference]: With dead ends: 291 [2019-02-15 11:24:44,391 INFO L226 Difference]: Without dead ends: 290 [2019-02-15 11:24:44,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 378 SyntacticMatches, 90 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32265 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-02-15 11:24:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-02-15 11:24:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2019-02-15 11:24:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2019-02-15 11:24:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2019-02-15 11:24:44,397 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 285 [2019-02-15 11:24:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:24:44,398 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2019-02-15 11:24:44,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-02-15 11:24:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2019-02-15 11:24:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-02-15 11:24:44,399 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:24:44,399 INFO L402 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1] [2019-02-15 11:24:44,400 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:24:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:24:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1549756020, now seen corresponding path program 95 times [2019-02-15 11:24:44,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:24:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:44,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:24:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:44,401 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:24:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:24:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:48,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:48,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:24:48,755 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:24:48,755 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:24:48,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:24:48,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:24:48,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:24:48,766 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:24:49,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2019-02-15 11:24:49,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:24:49,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:24:49,369 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 [2019-02-15 11:24:49,369 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:24:49,386 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:24:49,386 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:24:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:54,587 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:24:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:24:58,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:24:58,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 196 [2019-02-15 11:24:58,883 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:24:58,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-02-15 11:24:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-02-15 11:24:58,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-02-15 11:24:58,886 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 194 states. [2019-02-15 11:24:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:24:59,703 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2019-02-15 11:24:59,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-02-15 11:24:59,704 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 288 [2019-02-15 11:24:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:24:59,705 INFO L225 Difference]: With dead ends: 294 [2019-02-15 11:24:59,705 INFO L226 Difference]: Without dead ends: 293 [2019-02-15 11:24:59,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 382 SyntacticMatches, 92 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32762 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-02-15 11:24:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-02-15 11:24:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2019-02-15 11:24:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2019-02-15 11:24:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2019-02-15 11:24:59,712 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 288 [2019-02-15 11:24:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:24:59,712 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2019-02-15 11:24:59,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-02-15 11:24:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2019-02-15 11:24:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2019-02-15 11:24:59,714 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:24:59,714 INFO L402 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1] [2019-02-15 11:24:59,714 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:24:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:24:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2116881696, now seen corresponding path program 96 times [2019-02-15 11:24:59,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:24:59,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:59,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:24:59,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:24:59,715 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:24:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:25:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:04,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:04,294 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:25:04,294 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:25:04,294 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:25:04,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:04,294 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:25:04,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:25:04,304 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:25:04,403 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:25:04,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:25:04,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:25:04,419 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 [2019-02-15 11:25:04,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:25:04,430 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:25:04,431 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:25:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:09,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:25:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:14,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:25:14,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 197 [2019-02-15 11:25:14,456 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:25:14,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-02-15 11:25:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-02-15 11:25:14,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-02-15 11:25:14,459 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 196 states. [2019-02-15 11:25:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:25:15,172 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2019-02-15 11:25:15,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-02-15 11:25:15,172 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 291 [2019-02-15 11:25:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:25:15,174 INFO L225 Difference]: With dead ends: 297 [2019-02-15 11:25:15,174 INFO L226 Difference]: Without dead ends: 296 [2019-02-15 11:25:15,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 386 SyntacticMatches, 94 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33259 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-02-15 11:25:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-02-15 11:25:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2019-02-15 11:25:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-02-15 11:25:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2019-02-15 11:25:15,181 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 291 [2019-02-15 11:25:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:25:15,181 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2019-02-15 11:25:15,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-02-15 11:25:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2019-02-15 11:25:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-02-15 11:25:15,182 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:25:15,182 INFO L402 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1] [2019-02-15 11:25:15,182 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:25:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:25:15,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1017839884, now seen corresponding path program 97 times [2019-02-15 11:25:15,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:25:15,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:25:15,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:25:15,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:25:15,183 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:25:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:25:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:19,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:19,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:25:19,727 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:25:19,727 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:25:19,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:19,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:25:19,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:25:19,737 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:25:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:25:19,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:25:19,832 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 [2019-02-15 11:25:19,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:25:19,841 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:25:19,841 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:25:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:25,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:25:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:29,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:25:29,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 198 [2019-02-15 11:25:29,811 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:25:29,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-02-15 11:25:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-02-15 11:25:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-02-15 11:25:29,815 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 198 states. [2019-02-15 11:25:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:25:30,667 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2019-02-15 11:25:30,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-02-15 11:25:30,668 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 294 [2019-02-15 11:25:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:25:30,669 INFO L225 Difference]: With dead ends: 300 [2019-02-15 11:25:30,669 INFO L226 Difference]: Without dead ends: 299 [2019-02-15 11:25:30,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 390 SyntacticMatches, 96 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-02-15 11:25:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-02-15 11:25:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2019-02-15 11:25:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2019-02-15 11:25:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2019-02-15 11:25:30,677 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 294 [2019-02-15 11:25:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:25:30,678 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2019-02-15 11:25:30,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-02-15 11:25:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2019-02-15 11:25:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-02-15 11:25:30,679 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:25:30,679 INFO L402 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1] [2019-02-15 11:25:30,679 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:25:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:25:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1084000, now seen corresponding path program 98 times [2019-02-15 11:25:30,679 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:25:30,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:25:30,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:25:30,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:25:30,680 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:25:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:25:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:35,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:35,266 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:25:35,266 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:25:35,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:25:35,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:35,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:25:35,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-15 11:25:35,276 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-15 11:25:35,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 99 check-sat command(s) [2019-02-15 11:25:35,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:25:35,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:25:35,922 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 [2019-02-15 11:25:35,922 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:25:35,943 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:25:35,943 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:25:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:41,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:25:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:46,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:25:46,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 199 [2019-02-15 11:25:46,055 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:25:46,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-02-15 11:25:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-02-15 11:25:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-02-15 11:25:46,058 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 200 states. [2019-02-15 11:25:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:25:46,975 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2019-02-15 11:25:46,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-02-15 11:25:46,976 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 297 [2019-02-15 11:25:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:25:46,978 INFO L225 Difference]: With dead ends: 303 [2019-02-15 11:25:46,978 INFO L226 Difference]: Without dead ends: 302 [2019-02-15 11:25:46,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 394 SyntacticMatches, 98 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34253 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-02-15 11:25:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-02-15 11:25:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2019-02-15 11:25:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-02-15 11:25:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2019-02-15 11:25:46,985 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 297 [2019-02-15 11:25:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:25:46,985 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2019-02-15 11:25:46,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-02-15 11:25:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2019-02-15 11:25:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2019-02-15 11:25:46,986 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:25:46,986 INFO L402 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1] [2019-02-15 11:25:46,986 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:25:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:25:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2066335884, now seen corresponding path program 99 times [2019-02-15 11:25:46,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:25:46,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:25:46,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:25:46,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:25:46,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:25:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:25:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:51,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:51,933 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:25:51,933 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:25:51,933 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:25:51,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:25:51,934 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:25:51,961 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-15 11:25:51,961 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-15 11:25:52,093 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-15 11:25:52,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-15 11:25:52,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:25:52,107 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 [2019-02-15 11:25:52,107 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:25:52,116 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:25:52,116 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-02-15 11:25:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:25:57,777 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:02,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:26:02,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 200 [2019-02-15 11:26:02,194 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:26:02,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-02-15 11:26:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-02-15 11:26:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-02-15 11:26:02,200 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 202 states. [2019-02-15 11:26:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:03,118 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2019-02-15 11:26:03,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-02-15 11:26:03,119 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 300 [2019-02-15 11:26:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:03,121 INFO L225 Difference]: With dead ends: 306 [2019-02-15 11:26:03,121 INFO L226 Difference]: Without dead ends: 305 [2019-02-15 11:26:03,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 399 SyntacticMatches, 99 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34551 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-02-15 11:26:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-02-15 11:26:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2019-02-15 11:26:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-02-15 11:26:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2019-02-15 11:26:03,127 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 300 [2019-02-15 11:26:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:03,128 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2019-02-15 11:26:03,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-02-15 11:26:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2019-02-15 11:26:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-02-15 11:26:03,129 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:03,129 INFO L402 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1] [2019-02-15 11:26:03,130 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:03,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1553891808, now seen corresponding path program 100 times [2019-02-15 11:26:03,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:03,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:03,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-15 11:26:03,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:03,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 14752 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:07,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:07,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:07,704 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-15 11:26:07,704 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-15 11:26:07,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:07,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:26:07,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:07,713 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:07,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:07,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:12,224 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-02-15 11:26:12,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102, 102] imperfect sequences [102] total 103 [2019-02-15 11:26:12,224 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:26:12,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-02-15 11:26:12,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-02-15 11:26:12,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2019-02-15 11:26:12,227 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 103 states. [2019-02-15 11:26:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:12,979 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2019-02-15 11:26:12,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-02-15 11:26:12,980 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 303 [2019-02-15 11:26:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:12,980 INFO L225 Difference]: With dead ends: 306 [2019-02-15 11:26:12,981 INFO L226 Difference]: Without dead ends: 0 [2019-02-15 11:26:12,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 504 SyntacticMatches, 100 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5544 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2019-02-15 11:26:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-02-15 11:26:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-02-15 11:26:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-02-15 11:26:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-02-15 11:26:12,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 303 [2019-02-15 11:26:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:12,984 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-02-15 11:26:12,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-02-15 11:26:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-02-15 11:26:12,991 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-02-15 11:26:12,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-02-15 11:26:13,123 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 511 [2019-02-15 11:26:16,296 WARN L181 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 511 DAG size of output: 509 [2019-02-15 11:26:16,304 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 2 23) no Hoare annotation was computed. [2019-02-15 11:26:16,304 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 2 23) no Hoare annotation was computed. [2019-02-15 11:26:16,304 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-02-15 11:26:16,304 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2019-02-15 11:26:16,307 INFO L444 ceAbstractionStarter]: At program point L12-1(lines 12 21) the Hoare annotation is: (let ((.cse0 (<= 400 (select |#length| main_q.base)))) (or (and (<= main_q.offset 112) (<= (+ main_p.offset 112) main_q.offset) .cse0) (and (<= main_q.offset 260) (<= (+ main_p.offset 260) main_q.offset) .cse0) (and (<= (+ main_p.offset 128) main_q.offset) (<= main_q.offset 128) .cse0) (and (<= (+ main_p.offset 196) main_q.offset) (<= main_q.offset 196) .cse0) (and (<= main_q.offset 124) (<= (+ main_p.offset 124) main_q.offset) .cse0) (and (<= (+ main_p.offset 308) main_q.offset) (<= main_q.offset 308) .cse0) (and (<= main_q.offset 240) (<= (+ main_p.offset 240) main_q.offset) .cse0) (and (<= main_q.offset 332) (<= (+ main_p.offset 332) main_q.offset) .cse0) (and (<= (+ main_p.offset 296) main_q.offset) (<= main_q.offset 296) .cse0) (and (<= (+ main_p.offset 268) main_q.offset) (<= main_q.offset 268) .cse0) (and (<= main_q.offset 160) (<= (+ main_p.offset 160) main_q.offset) .cse0) (and (<= main_q.offset 180) (<= (+ main_p.offset 180) main_q.offset) .cse0) (and (<= (+ main_p.offset 368) main_q.offset) (<= main_q.offset 368) .cse0) (and (<= main_q.offset 384) (<= (+ main_p.offset 384) main_q.offset) .cse0) (and (<= main_q.offset 392) (<= (+ main_p.offset 392) main_q.offset) .cse0) (and (<= main_q.offset 144) .cse0 (<= (+ main_p.offset 144) main_q.offset)) (and (<= main_q.offset 200) (<= (+ main_p.offset 200) main_q.offset) .cse0) (and (<= (+ main_p.offset 288) main_q.offset) (<= main_q.offset 288) .cse0) (and (<= main_q.offset 340) (<= (+ main_p.offset 340) main_q.offset) .cse0) (and (<= main_q.offset 356) (<= (+ main_p.offset 356) main_q.offset) .cse0) (and (<= (+ main_p.offset 276) main_q.offset) (<= main_q.offset 276) .cse0) (and (<= main_q.offset 336) (<= (+ main_p.offset 336) main_q.offset) .cse0) (and (<= (+ main_p.offset 140) main_q.offset) (<= main_q.offset 140) .cse0) (and (<= main_q.offset 244) (<= (+ main_p.offset 244) main_q.offset) .cse0) (and (<= (+ main_p.offset 396) main_q.offset) (<= main_q.offset 396) .cse0) (and (<= (+ main_p.offset 312) main_q.offset) (<= main_q.offset 312) .cse0) (and (<= main_q.offset 148) (<= (+ main_p.offset 148) main_q.offset) .cse0) (and (<= (+ main_p.offset 352) main_q.offset) (<= main_q.offset 352) .cse0) (and (<= main_q.offset 344) (<= (+ main_p.offset 344) main_q.offset) .cse0) (and (<= main_q.offset 164) (<= (+ main_p.offset 164) main_q.offset) .cse0) (and (<= (+ main_p.offset 304) main_q.offset) (<= main_q.offset 304) .cse0) (and (<= main_q.offset 320) (<= (+ main_p.offset 320) main_q.offset) .cse0) (and (<= (+ main_p.offset 36) main_q.offset) (<= main_q.offset 36) .cse0) (and (<= (+ main_p.offset 44) main_q.offset) (<= main_q.offset 44) .cse0) (and (<= (+ main_p.offset 228) main_q.offset) (<= main_q.offset 228) .cse0) (and (<= main_p.offset main_q.offset) (<= main_q.offset 0) .cse0) (and (<= (+ main_p.offset 284) main_q.offset) (<= main_q.offset 284) .cse0) (and (<= (+ main_p.offset 188) main_q.offset) (<= main_q.offset 188) .cse0) (and (<= (+ main_p.offset 8) main_q.offset) (<= main_q.offset 8) .cse0) (and (<= main_q.offset 348) .cse0 (<= (+ main_p.offset 348) main_q.offset)) (<= (+ main_p.offset 400) main_q.offset) (and (<= (+ main_p.offset 224) main_q.offset) (<= main_q.offset 224) .cse0) (and (<= (+ main_p.offset 120) main_q.offset) (<= main_q.offset 120) .cse0) (and (<= main_q.offset 232) (<= (+ main_p.offset 232) main_q.offset) .cse0) (and (<= main_q.offset 92) (<= (+ main_p.offset 92) main_q.offset) .cse0) (and (<= main_q.offset 236) (<= (+ main_p.offset 236) main_q.offset) .cse0) (and (<= (+ main_p.offset 328) main_q.offset) (<= main_q.offset 328) .cse0) (and (<= main_q.offset 12) (<= (+ main_p.offset 12) main_q.offset) .cse0) (and (<= (+ main_p.offset 64) main_q.offset) (<= main_q.offset 64) .cse0) (and (<= (+ main_p.offset 192) main_q.offset) (<= main_q.offset 192) .cse0) (and (<= (+ main_p.offset 104) main_q.offset) (<= main_q.offset 104) .cse0) (and (<= main_q.offset 280) (<= (+ main_p.offset 280) main_q.offset) .cse0) (and (<= (+ main_p.offset 316) main_q.offset) (<= main_q.offset 316) .cse0) (and (<= main_q.offset 152) (<= (+ main_p.offset 152) main_q.offset) .cse0) (and (<= (+ main_p.offset 248) main_q.offset) (<= main_q.offset 248) .cse0) (and (<= main_q.offset 28) (<= (+ main_p.offset 28) main_q.offset) .cse0) (and (<= (+ main_p.offset 68) main_q.offset) (<= main_q.offset 68) .cse0) (and (<= main_q.offset 4) .cse0 (<= (+ main_p.offset 4) main_q.offset)) (and (<= (+ main_p.offset 204) main_q.offset) (<= main_q.offset 204) .cse0) (and (<= main_q.offset 380) (<= (+ main_p.offset 380) main_q.offset) .cse0) (and (<= main_q.offset 52) (<= (+ main_p.offset 52) main_q.offset) .cse0) (and (<= (+ main_p.offset 172) main_q.offset) (<= main_q.offset 172) .cse0) (and (<= main_q.offset 56) (<= (+ main_p.offset 56) main_q.offset) .cse0) (and (<= main_q.offset 60) (<= (+ main_p.offset 60) main_q.offset) .cse0) (and (<= main_q.offset 100) (<= (+ main_p.offset 100) main_q.offset) .cse0) (and (<= main_q.offset 208) (<= (+ main_p.offset 208) main_q.offset) .cse0) (and (<= (+ main_p.offset 220) main_q.offset) (<= main_q.offset 220) .cse0) (and (<= (+ main_p.offset 132) main_q.offset) (<= main_q.offset 132) .cse0) (and (<= main_q.offset 176) (<= (+ main_p.offset 176) main_q.offset) .cse0) (and (<= main_q.offset 116) (<= (+ main_p.offset 116) main_q.offset) .cse0) (and (<= (+ main_p.offset 136) main_q.offset) (<= main_q.offset 136) .cse0) (and (<= main_q.offset 184) (<= (+ main_p.offset 184) main_q.offset) .cse0) (and (<= main_q.offset 20) (<= (+ main_p.offset 20) main_q.offset) .cse0) (and (<= (+ main_p.offset 216) main_q.offset) (<= main_q.offset 216) .cse0) (and (<= (+ main_p.offset 376) main_q.offset) (<= main_q.offset 376) .cse0) (and (<= (+ main_p.offset 324) main_q.offset) (<= main_q.offset 324) .cse0) (and (<= (+ main_p.offset 72) main_q.offset) (<= main_q.offset 72) .cse0) (and (<= main_q.offset 76) (<= (+ main_p.offset 76) main_q.offset) .cse0) (and (<= main_q.offset 16) (<= (+ main_p.offset 16) main_q.offset) .cse0) (and (<= main_q.offset 84) (<= (+ main_p.offset 84) main_q.offset) .cse0) (and (<= (+ main_p.offset 364) main_q.offset) (<= main_q.offset 364) .cse0) (and (<= (+ main_p.offset 156) main_q.offset) (<= main_q.offset 156) .cse0) (and (<= (+ main_p.offset 88) main_q.offset) .cse0 (<= main_q.offset 88)) (and (<= main_q.offset 168) (<= (+ main_p.offset 168) main_q.offset) .cse0) (and (<= (+ main_p.offset 48) main_q.offset) (<= main_q.offset 48) .cse0) (and (<= main_q.offset 252) (<= (+ main_p.offset 252) main_q.offset) .cse0) (and (<= (+ main_p.offset 264) main_q.offset) (<= main_q.offset 264) .cse0) (and (<= (+ main_p.offset 388) main_q.offset) (<= main_q.offset 388) .cse0) (and (<= main_q.offset 256) (<= (+ main_p.offset 256) main_q.offset) .cse0) (and (<= (+ main_p.offset 40) main_q.offset) (<= main_q.offset 40) .cse0) (and (<= main_q.offset 300) .cse0 (<= (+ main_p.offset 300) main_q.offset)) (and (<= (+ main_p.offset 80) main_q.offset) (<= main_q.offset 80) .cse0) (and (<= main_q.offset 108) .cse0 (<= (+ main_p.offset 108) main_q.offset)) (and (<= main_q.offset 212) (<= (+ main_p.offset 212) main_q.offset) .cse0) (and (<= main_q.offset 372) (<= (+ main_p.offset 372) main_q.offset) .cse0) (and (<= (+ main_p.offset 96) main_q.offset) .cse0 (<= main_q.offset 96)) (and (<= (+ main_p.offset 272) main_q.offset) (<= main_q.offset 272) .cse0) (and (<= main_q.offset 292) (<= (+ main_p.offset 292) main_q.offset) .cse0) (and (<= (+ main_p.offset 360) main_q.offset) (<= main_q.offset 360) .cse0) (and (<= main_q.offset 32) (<= (+ main_p.offset 32) main_q.offset) .cse0) (and (<= (+ main_p.offset 24) main_q.offset) (<= main_q.offset 24) .cse0))) [2019-02-15 11:26:16,307 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 2 23) no Hoare annotation was computed. [2019-02-15 11:26:16,307 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 15) no Hoare annotation was computed. [2019-02-15 11:26:16,348 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 11:26:16 BoogieIcfgContainer [2019-02-15 11:26:16,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-02-15 11:26:16,349 INFO L168 Benchmark]: Toolchain (without parser) took 721452.23 ms. Allocated memory was 134.2 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 109.2 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 702.2 MB. Max. memory is 7.1 GB. [2019-02-15 11:26:16,350 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 134.2 MB. Free memory is still 110.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-15 11:26:16,350 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.96 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 107.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-02-15 11:26:16,351 INFO L168 Benchmark]: Boogie Preprocessor took 22.15 ms. Allocated memory is still 134.2 MB. Free memory was 107.0 MB in the beginning and 105.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-15 11:26:16,351 INFO L168 Benchmark]: RCFGBuilder took 246.51 ms. Allocated memory is still 134.2 MB. Free memory was 105.7 MB in the beginning and 95.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-02-15 11:26:16,352 INFO L168 Benchmark]: TraceAbstraction took 721118.43 ms. Allocated memory was 134.2 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 95.5 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 688.5 MB. Max. memory is 7.1 GB. [2019-02-15 11:26:16,354 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 0.22 ms. Allocated memory is still 134.2 MB. Free memory is still 110.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 60.96 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 107.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.15 ms. Allocated memory is still 134.2 MB. Free memory was 107.0 MB in the beginning and 105.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 246.51 ms. Allocated memory is still 134.2 MB. Free memory was 105.7 MB in the beginning and 95.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 721118.43 ms. Allocated memory was 134.2 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 95.5 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 688.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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: 12]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((q!offset <= 112 && p!offset + 112 <= q!offset) && 400 <= #length[q!base]) || ((q!offset <= 260 && p!offset + 260 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 128 <= q!offset && q!offset <= 128) && 400 <= #length[q!base])) || ((p!offset + 196 <= q!offset && q!offset <= 196) && 400 <= #length[q!base])) || ((q!offset <= 124 && p!offset + 124 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 308 <= q!offset && q!offset <= 308) && 400 <= #length[q!base])) || ((q!offset <= 240 && p!offset + 240 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 332 && p!offset + 332 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 296 <= q!offset && q!offset <= 296) && 400 <= #length[q!base])) || ((p!offset + 268 <= q!offset && q!offset <= 268) && 400 <= #length[q!base])) || ((q!offset <= 160 && p!offset + 160 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 180 && p!offset + 180 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 368 <= q!offset && q!offset <= 368) && 400 <= #length[q!base])) || ((q!offset <= 384 && p!offset + 384 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 392 && p!offset + 392 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 144 && 400 <= #length[q!base]) && p!offset + 144 <= q!offset)) || ((q!offset <= 200 && p!offset + 200 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 288 <= q!offset && q!offset <= 288) && 400 <= #length[q!base])) || ((q!offset <= 340 && p!offset + 340 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 356 && p!offset + 356 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 276 <= q!offset && q!offset <= 276) && 400 <= #length[q!base])) || ((q!offset <= 336 && p!offset + 336 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 140 <= q!offset && q!offset <= 140) && 400 <= #length[q!base])) || ((q!offset <= 244 && p!offset + 244 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 396 <= q!offset && q!offset <= 396) && 400 <= #length[q!base])) || ((p!offset + 312 <= q!offset && q!offset <= 312) && 400 <= #length[q!base])) || ((q!offset <= 148 && p!offset + 148 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 352 <= q!offset && q!offset <= 352) && 400 <= #length[q!base])) || ((q!offset <= 344 && p!offset + 344 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 164 && p!offset + 164 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 304 <= q!offset && q!offset <= 304) && 400 <= #length[q!base])) || ((q!offset <= 320 && p!offset + 320 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 36 <= q!offset && q!offset <= 36) && 400 <= #length[q!base])) || ((p!offset + 44 <= q!offset && q!offset <= 44) && 400 <= #length[q!base])) || ((p!offset + 228 <= q!offset && q!offset <= 228) && 400 <= #length[q!base])) || ((p!offset <= 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q!offset <= 264) && 400 <= #length[q!base])) || ((p!offset + 388 <= q!offset && q!offset <= 388) && 400 <= #length[q!base])) || ((q!offset <= 256 && p!offset + 256 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 40 <= q!offset && q!offset <= 40) && 400 <= #length[q!base])) || ((q!offset <= 300 && 400 <= #length[q!base]) && p!offset + 300 <= q!offset)) || ((p!offset + 80 <= q!offset && q!offset <= 80) && 400 <= #length[q!base])) || ((q!offset <= 108 && 400 <= #length[q!base]) && p!offset + 108 <= q!offset)) || ((q!offset <= 212 && p!offset + 212 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 372 && p!offset + 372 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 96 <= q!offset && 400 <= #length[q!base]) && q!offset <= 96)) || ((p!offset + 272 <= q!offset && q!offset <= 272) && 400 <= #length[q!base])) || ((q!offset <= 292 && p!offset + 292 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 360 <= q!offset && q!offset <= 360) && 400 <= #length[q!base])) || ((q!offset <= 32 && p!offset + 32 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 24 <= q!offset && q!offset <= 24) && 400 <= #length[q!base]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 721.0s OverallTime, 101 OverallIterations, 101 TraceHistogramMax, 40.7s AutomataDifference, 0.0s DeadEndRemovalTime, 3.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 202 SDtfs, 7321 SDslu, 1 SDs, 0 SdLazy, 27597 SolverSat, 353 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35852 GetRequests, 20503 SyntacticMatches, 2649 SemanticMatches, 12700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303168 ImplicationChecksByTransitivity, 623.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=304occurred in iteration=100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 8.0s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 101 MinimizatonAttempts, 100 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1404 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 12.5s SatisfiabilityAnalysisTime, 647.3s InterpolantComputationTime, 30903 NumberOfCodeBlocks, 30903 NumberOfCodeBlocksAsserted, 1884 NumberOfCheckSat, 46052 ConstructedInterpolants, 0 QuantifiedInterpolants, 70702786 SizeOfPredicates, 596 NumberOfNonLiveVariables, 32500 ConjunctsInSsa, 15942 ConjunctsInUnsatCore, 301 InterpolantComputations, 3 PerfectInterpolantSequences, 44852/1530150 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...