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-f57a05f [2019-01-08 14:31:10,025 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:31:10,027 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:31:10,039 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-08 14:31:10,039 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-08 14:31:10,040 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-08 14:31:10,042 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-08 14:31:10,043 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-08 14:31:10,045 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-08 14:31:10,046 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-08 14:31:10,047 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-08 14:31:10,081 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 [2019-01-08 14:31:10,108 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:31:10,108 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:31:10,109 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:31:10,110 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:31:10,111 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:31:10,111 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:31:10,111 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:31:10,111 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:31:10,111 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:31:10,112 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-08 14:31:10,112 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-08 14:31:10,112 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:31:10,112 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:31:10,113 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:31:10,113 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:31:10,114 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:31:10,114 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:31:10,114 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:31:10,114 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:31:10,114 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:31:10,116 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:31:10,117 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:31:10,117 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:31:10,117 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:31:10,117 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:31:10,117 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:31:10,117 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:31:10,118 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:31:10,118 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:31:10,118 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:31:10,119 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:31:10,119 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:31:10,119 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:31:10,119 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:31:10,119 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:31:10,120 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:31:10,120 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:31:10,120 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:31:10,120 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:31:10,176 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:31:10,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:31:10,194 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:31:10,195 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:31:10,196 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:31:10,197 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl [2019-01-08 14:31:10,197 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified03.bpl' [2019-01-08 14:31:10,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:31:10,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:31:10,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:31:10,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:31:10,240 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:31:10,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,279 WARN L165 Inliner]: Program contained no entry procedure! [2019-01-08 14:31:10,279 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-01-08 14:31:10,280 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-01-08 14:31:10,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:31:10,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:31:10,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:31:10,300 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:31:10,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/1) ... [2019-01-08 14:31:10,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:31:10,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:31:10,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:31:10,329 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:31:10,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (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:8192 -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:8192 -smt2 -in -t:2000 [2019-01-08 14:31:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-08 14:31:10,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-08 14:31:10,397 INFO L130 BoogieDeclarations]: Found specification of procedure ~malloc [2019-01-08 14:31:10,692 INFO L278 CfgBuilder]: Using library mode [2019-01-08 14:31:10,693 INFO L286 CfgBuilder]: Removed 3 assue(true) statements. [2019-01-08 14:31:10,694 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:31:10 BoogieIcfgContainer [2019-01-08 14:31:10,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:31:10,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:31:10,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:31:10,699 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:31:10,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:31:10" (1/2) ... [2019-01-08 14:31:10,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d9426b and model type PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:31:10, skipping insertion in model container [2019-01-08 14:31:10,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:31:10" (2/2) ... [2019-01-08 14:31:10,703 INFO L112 eAbstractionObserver]: Analyzing ICFG PointerIncrement-simplified03.bpl [2019-01-08 14:31:10,711 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:31:10,719 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-08 14:31:10,737 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-08 14:31:10,771 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:31:10,771 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:31:10,771 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:31:10,771 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:31:10,772 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:31:10,772 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:31:10,772 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:31:10,772 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:31:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-08 14:31:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:31:10,798 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:10,799 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:31:10,802 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:10,808 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2019-01-08 14:31:10,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:10,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:10,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:10,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:10,856 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:11,036 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:31:11,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:31:11,037 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:31:11,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:31:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:31:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:31:11,070 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-08 14:31:11,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:11,203 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-01-08 14:31:11,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:31:11,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-08 14:31:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:11,216 INFO L225 Difference]: With dead ends: 15 [2019-01-08 14:31:11,216 INFO L226 Difference]: Without dead ends: 8 [2019-01-08 14:31:11,219 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 [2019-01-08 14:31:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-08 14:31:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-01-08 14:31:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-08 14:31:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-01-08 14:31:11,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 3 [2019-01-08 14:31:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:11,257 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-01-08 14:31:11,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:31:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-01-08 14:31:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:31:11,258 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:11,258 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:31:11,258 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 893294860, now seen corresponding path program 1 times [2019-01-08 14:31:11,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:11,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:11,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:11,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:11,261 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:11,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:11,469 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:11,470 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:31:11,473 INFO L207 CegarAbsIntRunner]: [0], [6], [7], [8], [12] [2019-01-08 14:31:11,569 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:31:11,569 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:31:21,276 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:31:21,278 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. [2019-01-08 14:31:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:21,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:31:21,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:21,286 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 [2019-01-08 14:31:21,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:21,302 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:21,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:21,410 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 [2019-01-08 14:31:21,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:21,464 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:21,464 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:21,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:21,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:21,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:31:21,777 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:21,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:31:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:31:21,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:31:21,779 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-01-08 14:31:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:21,928 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-01-08 14:31:21,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:31:21,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-01-08 14:31:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:21,930 INFO L225 Difference]: With dead ends: 12 [2019-01-08 14:31:21,930 INFO L226 Difference]: Without dead ends: 11 [2019-01-08 14:31:21,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:31:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-01-08 14:31:21,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-01-08 14:31:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-08 14:31:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-01-08 14:31:21,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2019-01-08 14:31:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:21,935 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-01-08 14:31:21,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:31:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-01-08 14:31:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-01-08 14:31:21,936 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:21,936 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1] [2019-01-08 14:31:21,937 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:21,938 INFO L82 PathProgramCache]: Analyzing trace with hash 529849760, now seen corresponding path program 2 times [2019-01-08 14:31:21,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:21,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:21,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:21,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:21,940 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:22,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:22,113 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:22,113 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:22,114 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:22,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:22,115 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 [2019-01-08 14:31:22,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:22,135 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:22,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:31:22,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:22,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:22,199 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 [2019-01-08 14:31:22,199 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:22,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:22,287 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:22,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:22,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:22,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:31:22,678 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:22,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:31:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:31:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:31:22,679 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-01-08 14:31:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:22,894 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-01-08 14:31:22,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:31:22,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-01-08 14:31:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:22,895 INFO L225 Difference]: With dead ends: 15 [2019-01-08 14:31:22,896 INFO L226 Difference]: Without dead ends: 14 [2019-01-08 14:31:22,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:31:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-08 14:31:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-01-08 14:31:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-01-08 14:31:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-01-08 14:31:22,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2019-01-08 14:31:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:22,900 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-01-08 14:31:22,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:31:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-01-08 14:31:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-01-08 14:31:22,901 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:22,901 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1] [2019-01-08 14:31:22,901 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash 749428876, now seen corresponding path program 3 times [2019-01-08 14:31:22,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:22,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:22,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:22,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:22,903 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:22,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:22,996 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:22,996 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:22,996 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:22,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:22,997 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 [2019-01-08 14:31:23,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:23,009 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:23,025 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:23,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:23,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:23,037 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 [2019-01-08 14:31:23,038 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:23,049 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:23,050 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:23,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:23,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:23,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:31:23,439 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:23,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:31:23,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:31:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:31:23,440 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-01-08 14:31:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:23,635 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-01-08 14:31:23,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:31:23,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-01-08 14:31:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:23,636 INFO L225 Difference]: With dead ends: 18 [2019-01-08 14:31:23,636 INFO L226 Difference]: Without dead ends: 17 [2019-01-08 14:31:23,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:31:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-01-08 14:31:23,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-01-08 14:31:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-08 14:31:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-01-08 14:31:23,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2019-01-08 14:31:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:23,642 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-01-08 14:31:23,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:31:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-01-08 14:31:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-01-08 14:31:23,643 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:23,643 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1] [2019-01-08 14:31:23,643 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:23,643 INFO L82 PathProgramCache]: Analyzing trace with hash 995681824, now seen corresponding path program 4 times [2019-01-08 14:31:23,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:23,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:23,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:23,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:23,644 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:23,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:23,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:23,778 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:23,778 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:23,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:23,778 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 [2019-01-08 14:31:23,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:23,792 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:23,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:23,823 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 [2019-01-08 14:31:23,823 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:23,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:23,849 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:23,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:24,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:24,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:31:24,359 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:24,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:31:24,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:31:24,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:31:24,360 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2019-01-08 14:31:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:24,416 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-01-08 14:31:24,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:31:24,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-01-08 14:31:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:24,417 INFO L225 Difference]: With dead ends: 21 [2019-01-08 14:31:24,420 INFO L226 Difference]: Without dead ends: 20 [2019-01-08 14:31:24,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:31:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-01-08 14:31:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-01-08 14:31:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-01-08 14:31:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-01-08 14:31:24,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2019-01-08 14:31:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:24,424 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-01-08 14:31:24,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:31:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-01-08 14:31:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-01-08 14:31:24,425 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:24,425 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1] [2019-01-08 14:31:24,426 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1313114124, now seen corresponding path program 5 times [2019-01-08 14:31:24,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:24,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:24,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:24,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:24,427 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:24,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:24,703 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:24,703 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:24,703 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:24,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:24,703 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 [2019-01-08 14:31:24,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:24,713 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:24,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-01-08 14:31:24,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:24,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:24,743 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 [2019-01-08 14:31:24,744 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:24,754 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:24,755 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:24,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:25,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:25,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-08 14:31:25,070 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:25,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-08 14:31:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-08 14:31:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:31:25,071 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 14 states. [2019-01-08 14:31:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:25,131 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-01-08 14:31:25,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:31:25,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-01-08 14:31:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:25,132 INFO L225 Difference]: With dead ends: 24 [2019-01-08 14:31:25,132 INFO L226 Difference]: Without dead ends: 23 [2019-01-08 14:31:25,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:31:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-01-08 14:31:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-01-08 14:31:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-01-08 14:31:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-01-08 14:31:25,137 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2019-01-08 14:31:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:25,137 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-01-08 14:31:25,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-08 14:31:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-01-08 14:31:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-01-08 14:31:25,138 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:25,139 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1] [2019-01-08 14:31:25,139 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash 420777632, now seen corresponding path program 6 times [2019-01-08 14:31:25,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:25,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:25,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:25,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:25,140 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:25,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:25,246 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:25,246 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:25,246 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:25,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:25,247 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 [2019-01-08 14:31:25,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:25,256 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:25,268 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:25,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:25,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:25,274 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 [2019-01-08 14:31:25,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:25,285 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:25,286 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:25,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:25,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:25,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2019-01-08 14:31:25,502 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:25,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-01-08 14:31:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-01-08 14:31:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-01-08 14:31:25,503 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2019-01-08 14:31:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:25,612 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-01-08 14:31:25,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:31:25,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-01-08 14:31:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:25,616 INFO L225 Difference]: With dead ends: 27 [2019-01-08 14:31:25,617 INFO L226 Difference]: Without dead ends: 26 [2019-01-08 14:31:25,618 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 [2019-01-08 14:31:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-01-08 14:31:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-01-08 14:31:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-08 14:31:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-01-08 14:31:25,622 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2019-01-08 14:31:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:25,622 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-01-08 14:31:25,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-01-08 14:31:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-01-08 14:31:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-01-08 14:31:25,623 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:25,623 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1] [2019-01-08 14:31:25,623 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:25,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1623060596, now seen corresponding path program 7 times [2019-01-08 14:31:25,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:25,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:25,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:25,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:25,626 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:25,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:25,753 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:25,754 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:25,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:25,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:25,754 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 [2019-01-08 14:31:25,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:25,763 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:25,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:25,807 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 [2019-01-08 14:31:25,807 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:25,816 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:25,816 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:25,923 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:26,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:26,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2019-01-08 14:31:26,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-01-08 14:31:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-01-08 14:31:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-01-08 14:31:26,081 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 18 states. [2019-01-08 14:31:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:26,352 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-01-08 14:31:26,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:31:26,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-01-08 14:31:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:26,354 INFO L225 Difference]: With dead ends: 30 [2019-01-08 14:31:26,354 INFO L226 Difference]: Without dead ends: 29 [2019-01-08 14:31:26,355 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 [2019-01-08 14:31:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-01-08 14:31:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-01-08 14:31:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-01-08 14:31:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-01-08 14:31:26,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2019-01-08 14:31:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:26,360 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-01-08 14:31:26,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-01-08 14:31:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-01-08 14:31:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-01-08 14:31:26,361 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:26,361 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1] [2019-01-08 14:31:26,361 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash 143644448, now seen corresponding path program 8 times [2019-01-08 14:31:26,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:26,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:26,363 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:26,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:26,481 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:26,481 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:26,481 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:26,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:26,482 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 [2019-01-08 14:31:26,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:26,498 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:26,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-01-08 14:31:26,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:26,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:26,541 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 [2019-01-08 14:31:26,541 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:26,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:26,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:26,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:26,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:26,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2019-01-08 14:31:26,849 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:26,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-01-08 14:31:26,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-01-08 14:31:26,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-08 14:31:26,851 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-01-08 14:31:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:26,984 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-01-08 14:31:26,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:31:26,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-01-08 14:31:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:26,985 INFO L225 Difference]: With dead ends: 33 [2019-01-08 14:31:26,986 INFO L226 Difference]: Without dead ends: 32 [2019-01-08 14:31:26,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-08 14:31:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-08 14:31:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-01-08 14:31:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-08 14:31:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-01-08 14:31:26,994 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2019-01-08 14:31:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:26,994 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-01-08 14:31:26,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-01-08 14:31:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-01-08 14:31:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-01-08 14:31:26,995 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:26,999 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1] [2019-01-08 14:31:27,000 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1524365068, now seen corresponding path program 9 times [2019-01-08 14:31:27,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:27,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:27,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:27,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:27,002 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:27,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:27,256 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:27,257 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:27,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:27,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:27,257 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 [2019-01-08 14:31:27,266 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:27,266 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:27,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:27,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:27,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:27,291 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 [2019-01-08 14:31:27,292 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:27,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:27,301 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:27,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:27,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:27,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2019-01-08 14:31:27,884 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:27,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-01-08 14:31:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-01-08 14:31:27,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-08 14:31:27,887 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2019-01-08 14:31:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:28,000 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-01-08 14:31:28,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-08 14:31:28,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-01-08 14:31:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:28,002 INFO L225 Difference]: With dead ends: 36 [2019-01-08 14:31:28,003 INFO L226 Difference]: Without dead ends: 35 [2019-01-08 14:31:28,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-08 14:31:28,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-01-08 14:31:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-01-08 14:31:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-08 14:31:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-01-08 14:31:28,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2019-01-08 14:31:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:28,009 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-01-08 14:31:28,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-01-08 14:31:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-01-08 14:31:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-01-08 14:31:28,011 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:28,011 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1] [2019-01-08 14:31:28,011 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1670561696, now seen corresponding path program 10 times [2019-01-08 14:31:28,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:28,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:28,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:28,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:28,013 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:28,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:28,208 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:28,208 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:28,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:28,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:28,209 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 [2019-01-08 14:31:28,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:28,219 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:28,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:28,278 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 [2019-01-08 14:31:28,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:28,299 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:28,299 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:28,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:28,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:28,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2019-01-08 14:31:28,933 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:28,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-01-08 14:31:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-01-08 14:31:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-08 14:31:28,935 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 24 states. [2019-01-08 14:31:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:29,073 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-01-08 14:31:29,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-08 14:31:29,076 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2019-01-08 14:31:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:29,077 INFO L225 Difference]: With dead ends: 39 [2019-01-08 14:31:29,077 INFO L226 Difference]: Without dead ends: 38 [2019-01-08 14:31:29,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-08 14:31:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-01-08 14:31:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-01-08 14:31:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-08 14:31:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-01-08 14:31:29,082 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2019-01-08 14:31:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:29,083 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-01-08 14:31:29,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-01-08 14:31:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-01-08 14:31:29,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-01-08 14:31:29,084 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:29,084 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1] [2019-01-08 14:31:29,084 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1917468300, now seen corresponding path program 11 times [2019-01-08 14:31:29,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:29,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:29,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:29,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:29,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:29,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:29,263 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:29,263 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:29,263 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:29,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:29,264 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 [2019-01-08 14:31:29,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:29,277 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:29,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-01-08 14:31:29,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:29,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:29,328 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 [2019-01-08 14:31:29,329 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:29,341 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:29,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:29,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:29,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:29,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2019-01-08 14:31:29,785 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:29,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-01-08 14:31:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-01-08 14:31:29,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-08 14:31:29,787 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 26 states. [2019-01-08 14:31:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:29,895 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-01-08 14:31:29,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-01-08 14:31:29,896 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2019-01-08 14:31:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:29,897 INFO L225 Difference]: With dead ends: 42 [2019-01-08 14:31:29,897 INFO L226 Difference]: Without dead ends: 41 [2019-01-08 14:31:29,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-08 14:31:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-01-08 14:31:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-01-08 14:31:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-08 14:31:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-01-08 14:31:29,903 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2019-01-08 14:31:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:29,904 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-01-08 14:31:29,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-01-08 14:31:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-01-08 14:31:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-01-08 14:31:29,905 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:29,905 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1] [2019-01-08 14:31:29,905 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:29,906 INFO L82 PathProgramCache]: Analyzing trace with hash 233130016, now seen corresponding path program 12 times [2019-01-08 14:31:29,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:29,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:29,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:29,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:29,907 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:30,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:30,273 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:30,274 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:30,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:30,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:30,274 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 [2019-01-08 14:31:30,284 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:30,284 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:30,318 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:30,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:30,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:30,324 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 [2019-01-08 14:31:30,324 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:30,334 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:30,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:30,542 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:30,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:30,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2019-01-08 14:31:30,837 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:30,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-01-08 14:31:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-01-08 14:31:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-08 14:31:30,839 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 28 states. [2019-01-08 14:31:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:30,949 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-01-08 14:31:30,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-01-08 14:31:30,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2019-01-08 14:31:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:30,951 INFO L225 Difference]: With dead ends: 45 [2019-01-08 14:31:30,951 INFO L226 Difference]: Without dead ends: 44 [2019-01-08 14:31:30,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-08 14:31:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-01-08 14:31:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-01-08 14:31:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-08 14:31:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-01-08 14:31:30,957 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2019-01-08 14:31:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:30,957 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-01-08 14:31:30,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-01-08 14:31:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-01-08 14:31:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-01-08 14:31:30,958 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:30,959 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1] [2019-01-08 14:31:30,959 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:30,959 INFO L82 PathProgramCache]: Analyzing trace with hash 214230540, now seen corresponding path program 13 times [2019-01-08 14:31:30,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:30,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:30,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:30,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:30,960 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:31,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:31,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:31,188 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:31,188 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:31,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:31,188 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 [2019-01-08 14:31:31,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:31,199 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:31,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:31,222 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 [2019-01-08 14:31:31,223 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:31,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:31,237 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:31,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:32,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:32,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2019-01-08 14:31:32,324 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:32,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-01-08 14:31:32,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-01-08 14:31:32,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-08 14:31:32,325 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 30 states. [2019-01-08 14:31:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:32,435 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-01-08 14:31:32,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-01-08 14:31:32,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2019-01-08 14:31:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:32,437 INFO L225 Difference]: With dead ends: 48 [2019-01-08 14:31:32,437 INFO L226 Difference]: Without dead ends: 47 [2019-01-08 14:31:32,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-08 14:31:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-01-08 14:31:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-01-08 14:31:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-01-08 14:31:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-01-08 14:31:32,444 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2019-01-08 14:31:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:32,444 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-01-08 14:31:32,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-01-08 14:31:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-01-08 14:31:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-01-08 14:31:32,445 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:32,445 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1] [2019-01-08 14:31:32,446 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash -179343200, now seen corresponding path program 14 times [2019-01-08 14:31:32,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:32,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:32,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:32,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:32,447 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:32,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:32,702 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:32,702 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:32,702 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:32,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:32,703 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 [2019-01-08 14:31:32,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:32,716 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:32,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-01-08 14:31:32,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:32,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:32,825 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 [2019-01-08 14:31:32,826 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:32,839 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:32,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:33,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:33,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:33,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2019-01-08 14:31:33,523 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:33,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-01-08 14:31:33,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-01-08 14:31:33,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-01-08 14:31:33,525 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 32 states. [2019-01-08 14:31:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:33,778 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-01-08 14:31:33,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-01-08 14:31:33,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2019-01-08 14:31:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:33,780 INFO L225 Difference]: With dead ends: 51 [2019-01-08 14:31:33,780 INFO L226 Difference]: Without dead ends: 50 [2019-01-08 14:31:33,784 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 [2019-01-08 14:31:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-01-08 14:31:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-01-08 14:31:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-01-08 14:31:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-01-08 14:31:33,793 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2019-01-08 14:31:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:33,793 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-01-08 14:31:33,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-01-08 14:31:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-01-08 14:31:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-01-08 14:31:33,794 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:33,794 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1] [2019-01-08 14:31:33,797 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash 126086540, now seen corresponding path program 15 times [2019-01-08 14:31:33,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:33,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:33,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:33,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:33,798 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:34,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:34,164 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:34,164 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:34,164 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:34,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:34,164 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 [2019-01-08 14:31:34,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:34,174 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:34,190 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:34,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:34,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:34,199 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 [2019-01-08 14:31:34,199 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:34,211 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:34,211 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:34,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:34,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:34,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2019-01-08 14:31:34,817 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:34,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-01-08 14:31:34,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-01-08 14:31:34,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-01-08 14:31:34,819 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 34 states. [2019-01-08 14:31:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:34,929 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-01-08 14:31:34,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-01-08 14:31:34,930 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2019-01-08 14:31:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:34,930 INFO L225 Difference]: With dead ends: 54 [2019-01-08 14:31:34,931 INFO L226 Difference]: Without dead ends: 53 [2019-01-08 14:31:34,932 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 [2019-01-08 14:31:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-01-08 14:31:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-01-08 14:31:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-08 14:31:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-01-08 14:31:34,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 48 [2019-01-08 14:31:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:34,937 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-01-08 14:31:34,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-01-08 14:31:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-01-08 14:31:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-01-08 14:31:34,938 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:34,938 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1] [2019-01-08 14:31:34,939 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:34,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1852229344, now seen corresponding path program 16 times [2019-01-08 14:31:34,939 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:34,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:34,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:34,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:34,940 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:35,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:35,972 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:35,973 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:35,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:35,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:35,973 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 [2019-01-08 14:31:35,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:35,982 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:36,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:36,024 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 [2019-01-08 14:31:36,024 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:36,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:36,030 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:36,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:38,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:38,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2019-01-08 14:31:38,999 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:38,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-01-08 14:31:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-01-08 14:31:39,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-08 14:31:39,001 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 36 states. [2019-01-08 14:31:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:39,175 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-01-08 14:31:39,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-01-08 14:31:39,176 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2019-01-08 14:31:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:39,177 INFO L225 Difference]: With dead ends: 57 [2019-01-08 14:31:39,177 INFO L226 Difference]: Without dead ends: 56 [2019-01-08 14:31:39,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-08 14:31:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-08 14:31:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-01-08 14:31:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-01-08 14:31:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-01-08 14:31:39,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 51 [2019-01-08 14:31:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:39,185 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-01-08 14:31:39,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-01-08 14:31:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-01-08 14:31:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-01-08 14:31:39,186 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:39,186 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1] [2019-01-08 14:31:39,186 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1975473420, now seen corresponding path program 17 times [2019-01-08 14:31:39,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:39,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:39,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:39,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:39,515 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:39,515 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:39,515 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:39,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:39,515 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 [2019-01-08 14:31:39,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:39,533 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:39,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-01-08 14:31:39,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:39,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:39,628 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 [2019-01-08 14:31:39,628 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:39,641 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:39,642 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:39,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:40,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:40,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2019-01-08 14:31:40,357 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:40,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-01-08 14:31:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-01-08 14:31:40,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-01-08 14:31:40,359 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 38 states. [2019-01-08 14:31:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:40,487 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-01-08 14:31:40,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-01-08 14:31:40,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 54 [2019-01-08 14:31:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:40,489 INFO L225 Difference]: With dead ends: 60 [2019-01-08 14:31:40,489 INFO L226 Difference]: Without dead ends: 59 [2019-01-08 14:31:40,491 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 [2019-01-08 14:31:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-01-08 14:31:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-01-08 14:31:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-01-08 14:31:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-01-08 14:31:40,495 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 54 [2019-01-08 14:31:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:40,495 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-01-08 14:31:40,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-01-08 14:31:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-01-08 14:31:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-01-08 14:31:40,496 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:40,496 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1] [2019-01-08 14:31:40,496 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1686806944, now seen corresponding path program 18 times [2019-01-08 14:31:40,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:40,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:40,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:40,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:40,498 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:41,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:41,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:41,356 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:41,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:41,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:41,356 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 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 [2019-01-08 14:31:41,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:41,369 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:41,390 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:41,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:41,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:41,420 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 [2019-01-08 14:31:41,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:41,425 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:41,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:41,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:42,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:42,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2019-01-08 14:31:42,286 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:42,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-01-08 14:31:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-01-08 14:31:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-08 14:31:42,288 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 40 states. [2019-01-08 14:31:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:42,409 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-01-08 14:31:42,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-01-08 14:31:42,409 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 57 [2019-01-08 14:31:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:42,410 INFO L225 Difference]: With dead ends: 63 [2019-01-08 14:31:42,410 INFO L226 Difference]: Without dead ends: 62 [2019-01-08 14:31:42,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-08 14:31:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-08 14:31:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-01-08 14:31:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-08 14:31:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-01-08 14:31:42,417 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 57 [2019-01-08 14:31:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:42,417 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-01-08 14:31:42,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-01-08 14:31:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-01-08 14:31:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-01-08 14:31:42,418 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:42,418 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1] [2019-01-08 14:31:42,418 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash 548347020, now seen corresponding path program 19 times [2019-01-08 14:31:42,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:42,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:42,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:42,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:42,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:42,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:42,734 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:42,734 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:42,734 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:42,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:42,735 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 [2019-01-08 14:31:42,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:42,748 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:42,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:42,773 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 [2019-01-08 14:31:42,773 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:42,782 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:42,783 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:43,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:43,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:43,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2019-01-08 14:31:43,643 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:43,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-01-08 14:31:43,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-01-08 14:31:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-08 14:31:43,646 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 42 states. [2019-01-08 14:31:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:43,788 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-01-08 14:31:43,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-01-08 14:31:43,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2019-01-08 14:31:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:43,789 INFO L225 Difference]: With dead ends: 66 [2019-01-08 14:31:43,790 INFO L226 Difference]: Without dead ends: 65 [2019-01-08 14:31:43,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-08 14:31:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-08 14:31:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-01-08 14:31:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-01-08 14:31:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-01-08 14:31:43,797 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 60 [2019-01-08 14:31:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:43,797 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-01-08 14:31:43,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-01-08 14:31:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-01-08 14:31:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-01-08 14:31:43,798 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:43,798 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1] [2019-01-08 14:31:43,798 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2045487648, now seen corresponding path program 20 times [2019-01-08 14:31:43,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:43,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:43,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:43,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:43,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:44,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:44,322 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:44,322 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:44,322 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:44,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:44,322 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 [2019-01-08 14:31:44,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:44,331 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:44,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-01-08 14:31:44,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:44,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:44,384 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 [2019-01-08 14:31:44,385 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:44,394 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:44,394 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:44,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:45,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:45,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2019-01-08 14:31:45,604 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:45,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-01-08 14:31:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-01-08 14:31:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-08 14:31:45,607 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 44 states. [2019-01-08 14:31:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:45,755 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-01-08 14:31:45,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-01-08 14:31:45,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-01-08 14:31:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:45,757 INFO L225 Difference]: With dead ends: 69 [2019-01-08 14:31:45,757 INFO L226 Difference]: Without dead ends: 68 [2019-01-08 14:31:45,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-08 14:31:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-01-08 14:31:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-01-08 14:31:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-01-08 14:31:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-01-08 14:31:45,765 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 63 [2019-01-08 14:31:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:45,765 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-01-08 14:31:45,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-01-08 14:31:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-01-08 14:31:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-01-08 14:31:45,766 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:45,766 INFO L402 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1] [2019-01-08 14:31:45,767 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 126567436, now seen corresponding path program 21 times [2019-01-08 14:31:45,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:45,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:45,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:45,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:45,768 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:46,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:46,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:46,290 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:46,290 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:46,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:46,290 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 [2019-01-08 14:31:46,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:46,299 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:46,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:46,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:46,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:46,355 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 [2019-01-08 14:31:46,355 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:46,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:46,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:46,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:47,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:47,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2019-01-08 14:31:47,541 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:47,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-01-08 14:31:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-01-08 14:31:47,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-08 14:31:47,543 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 46 states. [2019-01-08 14:31:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:47,684 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-01-08 14:31:47,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-01-08 14:31:47,687 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2019-01-08 14:31:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:47,688 INFO L225 Difference]: With dead ends: 72 [2019-01-08 14:31:47,688 INFO L226 Difference]: Without dead ends: 71 [2019-01-08 14:31:47,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-08 14:31:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-01-08 14:31:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-01-08 14:31:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-01-08 14:31:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-01-08 14:31:47,692 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 66 [2019-01-08 14:31:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:47,693 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-01-08 14:31:47,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-01-08 14:31:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-01-08 14:31:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-01-08 14:31:47,693 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:47,693 INFO L402 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1] [2019-01-08 14:31:47,693 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash -410758496, now seen corresponding path program 22 times [2019-01-08 14:31:47,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:47,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:47,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:47,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:47,694 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:48,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:48,210 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:48,210 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:48,210 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:48,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:48,210 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 [2019-01-08 14:31:48,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:48,219 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:48,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:48,262 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 [2019-01-08 14:31:48,263 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:48,277 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:48,277 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:48,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:49,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:49,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2019-01-08 14:31:49,630 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:49,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-01-08 14:31:49,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-01-08 14:31:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-01-08 14:31:49,632 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 48 states. [2019-01-08 14:31:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:49,799 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-01-08 14:31:49,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-01-08 14:31:49,800 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 69 [2019-01-08 14:31:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:49,801 INFO L225 Difference]: With dead ends: 75 [2019-01-08 14:31:49,801 INFO L226 Difference]: Without dead ends: 74 [2019-01-08 14:31:49,802 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 [2019-01-08 14:31:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-01-08 14:31:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-01-08 14:31:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-01-08 14:31:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-01-08 14:31:49,808 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 69 [2019-01-08 14:31:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:49,808 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-01-08 14:31:49,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-01-08 14:31:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-01-08 14:31:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-01-08 14:31:49,809 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:49,809 INFO L402 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1] [2019-01-08 14:31:49,810 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash -544486516, now seen corresponding path program 23 times [2019-01-08 14:31:49,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:49,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:49,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:49,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:49,811 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:50,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:50,195 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:50,196 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:50,196 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:50,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:50,196 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 [2019-01-08 14:31:50,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:50,204 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:50,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-01-08 14:31:50,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:50,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:50,256 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 [2019-01-08 14:31:50,257 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:50,283 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:50,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:50,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:51,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:51,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 72 [2019-01-08 14:31:51,450 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:51,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-01-08 14:31:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-01-08 14:31:51,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-01-08 14:31:51,452 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 50 states. [2019-01-08 14:31:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:51,624 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-01-08 14:31:51,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-01-08 14:31:51,625 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 72 [2019-01-08 14:31:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:51,626 INFO L225 Difference]: With dead ends: 78 [2019-01-08 14:31:51,626 INFO L226 Difference]: Without dead ends: 77 [2019-01-08 14:31:51,627 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 [2019-01-08 14:31:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-08 14:31:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-01-08 14:31:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-01-08 14:31:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-01-08 14:31:51,631 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 72 [2019-01-08 14:31:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:51,631 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-01-08 14:31:51,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-01-08 14:31:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-01-08 14:31:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-01-08 14:31:51,632 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:51,632 INFO L402 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1] [2019-01-08 14:31:51,632 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1293720352, now seen corresponding path program 24 times [2019-01-08 14:31:51,632 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:51,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:51,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:51,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:51,633 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:52,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:52,052 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:52,052 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:52,052 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:52,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:52,053 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 [2019-01-08 14:31:52,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:52,061 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:52,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:52,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:52,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:52,092 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 [2019-01-08 14:31:52,092 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:52,098 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:52,098 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:52,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:53,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:53,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2019-01-08 14:31:53,513 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:53,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-01-08 14:31:53,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-01-08 14:31:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-01-08 14:31:53,515 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 52 states. [2019-01-08 14:31:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:53,706 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-01-08 14:31:53,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-01-08 14:31:53,706 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 75 [2019-01-08 14:31:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:53,707 INFO L225 Difference]: With dead ends: 81 [2019-01-08 14:31:53,707 INFO L226 Difference]: Without dead ends: 80 [2019-01-08 14:31:53,709 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 [2019-01-08 14:31:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-08 14:31:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-01-08 14:31:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-01-08 14:31:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-01-08 14:31:53,713 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 75 [2019-01-08 14:31:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:53,714 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-01-08 14:31:53,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-01-08 14:31:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-01-08 14:31:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-01-08 14:31:53,714 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:53,715 INFO L402 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1] [2019-01-08 14:31:53,715 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1813466356, now seen corresponding path program 25 times [2019-01-08 14:31:53,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:53,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:53,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:53,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:53,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:54,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:54,168 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:54,168 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:54,168 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:54,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:54,168 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 [2019-01-08 14:31:54,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:54,178 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:31:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:54,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:54,208 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 [2019-01-08 14:31:54,209 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:54,218 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:54,218 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:54,889 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:55,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:55,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 78 [2019-01-08 14:31:55,800 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:55,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-01-08 14:31:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-01-08 14:31:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-08 14:31:55,802 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 54 states. [2019-01-08 14:31:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:56,013 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-01-08 14:31:56,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-01-08 14:31:56,013 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 78 [2019-01-08 14:31:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:56,015 INFO L225 Difference]: With dead ends: 84 [2019-01-08 14:31:56,015 INFO L226 Difference]: Without dead ends: 83 [2019-01-08 14:31:56,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-08 14:31:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-01-08 14:31:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-01-08 14:31:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-01-08 14:31:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-01-08 14:31:56,020 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 78 [2019-01-08 14:31:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:56,020 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-01-08 14:31:56,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-01-08 14:31:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-01-08 14:31:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-01-08 14:31:56,021 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:56,021 INFO L402 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1] [2019-01-08 14:31:56,021 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:56,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1417446304, now seen corresponding path program 26 times [2019-01-08 14:31:56,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:56,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:56,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:31:56,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:56,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:56,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:56,586 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:56,587 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:56,587 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:56,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:56,587 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 [2019-01-08 14:31:56,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:31:56,595 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:31:56,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-01-08 14:31:56,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:56,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:56,666 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 [2019-01-08 14:31:56,667 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:56,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:56,677 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:57,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:31:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:58,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:31:58,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2019-01-08 14:31:58,189 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:31:58,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-01-08 14:31:58,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-01-08 14:31:58,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-08 14:31:58,191 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 56 states. [2019-01-08 14:31:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:31:58,359 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-01-08 14:31:58,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-01-08 14:31:58,360 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 81 [2019-01-08 14:31:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:31:58,361 INFO L225 Difference]: With dead ends: 87 [2019-01-08 14:31:58,361 INFO L226 Difference]: Without dead ends: 86 [2019-01-08 14:31:58,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-08 14:31:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-01-08 14:31:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-01-08 14:31:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-01-08 14:31:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-01-08 14:31:58,365 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 81 [2019-01-08 14:31:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:31:58,366 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-01-08 14:31:58,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-01-08 14:31:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-01-08 14:31:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-01-08 14:31:58,366 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:31:58,367 INFO L402 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1] [2019-01-08 14:31:58,367 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:31:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:31:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash -975570292, now seen corresponding path program 27 times [2019-01-08 14:31:58,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:31:58,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:58,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:31:58,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:31:58,368 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:31:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:31:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:58,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:58,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:31:58,865 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:31:58,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:31:58,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:31:58,866 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 [2019-01-08 14:31:58,876 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:31:58,876 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:31:58,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:31:58,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:31:58,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:31:58,911 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 [2019-01-08 14:31:58,911 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:31:58,920 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:31:58,920 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:31:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:31:59,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:00,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:00,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 84 [2019-01-08 14:32:00,923 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:00,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-01-08 14:32:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-01-08 14:32:00,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-08 14:32:00,924 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 58 states. [2019-01-08 14:32:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:01,104 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-01-08 14:32:01,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-01-08 14:32:01,105 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 84 [2019-01-08 14:32:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:01,106 INFO L225 Difference]: With dead ends: 90 [2019-01-08 14:32:01,106 INFO L226 Difference]: Without dead ends: 89 [2019-01-08 14:32:01,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-08 14:32:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-08 14:32:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-01-08 14:32:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-01-08 14:32:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-01-08 14:32:01,110 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 84 [2019-01-08 14:32:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:01,111 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-01-08 14:32:01,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-01-08 14:32:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-01-08 14:32:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-01-08 14:32:01,111 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:01,111 INFO L402 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1] [2019-01-08 14:32:01,112 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:01,112 INFO L82 PathProgramCache]: Analyzing trace with hash 829164576, now seen corresponding path program 28 times [2019-01-08 14:32:01,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:01,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:01,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:01,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:01,113 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:01,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:01,686 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:01,686 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:01,686 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:01,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:01,686 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 [2019-01-08 14:32:01,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:01,695 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:32:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:01,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:01,735 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 [2019-01-08 14:32:01,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:01,747 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:01,748 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:02,587 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:03,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:03,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2019-01-08 14:32:03,688 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:03,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-01-08 14:32:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-01-08 14:32:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-08 14:32:03,690 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 60 states. [2019-01-08 14:32:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:03,907 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-01-08 14:32:03,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-01-08 14:32:03,907 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 87 [2019-01-08 14:32:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:03,909 INFO L225 Difference]: With dead ends: 93 [2019-01-08 14:32:03,909 INFO L226 Difference]: Without dead ends: 92 [2019-01-08 14:32:03,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-08 14:32:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-01-08 14:32:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-01-08 14:32:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-08 14:32:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-01-08 14:32:03,916 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 87 [2019-01-08 14:32:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:03,916 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-01-08 14:32:03,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-01-08 14:32:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-01-08 14:32:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-01-08 14:32:03,917 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:03,917 INFO L402 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1] [2019-01-08 14:32:03,918 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1285005836, now seen corresponding path program 29 times [2019-01-08 14:32:03,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:03,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:03,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:03,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:03,919 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:04,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:04,617 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:04,617 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:04,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:04,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:04,617 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 [2019-01-08 14:32:04,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:32:04,632 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:32:04,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-01-08 14:32:04,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:04,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:04,718 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 [2019-01-08 14:32:04,718 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:04,735 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:04,735 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:05,440 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:06,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:06,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 90 [2019-01-08 14:32:06,588 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:06,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-01-08 14:32:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-01-08 14:32:06,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-08 14:32:06,590 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 62 states. [2019-01-08 14:32:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:06,781 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-01-08 14:32:06,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-01-08 14:32:06,782 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 90 [2019-01-08 14:32:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:06,783 INFO L225 Difference]: With dead ends: 96 [2019-01-08 14:32:06,783 INFO L226 Difference]: Without dead ends: 95 [2019-01-08 14:32:06,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-08 14:32:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-08 14:32:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-01-08 14:32:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-01-08 14:32:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-01-08 14:32:06,788 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 90 [2019-01-08 14:32:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:06,788 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-01-08 14:32:06,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-01-08 14:32:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-01-08 14:32:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-01-08 14:32:06,789 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:06,789 INFO L402 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1] [2019-01-08 14:32:06,789 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash 565392544, now seen corresponding path program 30 times [2019-01-08 14:32:06,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:06,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:06,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:06,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:06,790 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:07,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:07,474 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:07,474 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:07,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:07,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:07,474 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 [2019-01-08 14:32:07,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:32:07,484 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:32:07,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:32:07,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:07,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:07,522 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 [2019-01-08 14:32:07,523 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:07,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:07,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:08,177 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:09,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:09,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 93 [2019-01-08 14:32:09,396 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:09,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-01-08 14:32:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-01-08 14:32:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-08 14:32:09,398 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 64 states. [2019-01-08 14:32:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:09,607 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-01-08 14:32:09,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-01-08 14:32:09,608 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 93 [2019-01-08 14:32:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:09,609 INFO L225 Difference]: With dead ends: 99 [2019-01-08 14:32:09,609 INFO L226 Difference]: Without dead ends: 98 [2019-01-08 14:32:09,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-08 14:32:09,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-08 14:32:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-01-08 14:32:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-01-08 14:32:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-01-08 14:32:09,614 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 93 [2019-01-08 14:32:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:09,614 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-01-08 14:32:09,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-01-08 14:32:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-01-08 14:32:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-01-08 14:32:09,615 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:09,615 INFO L402 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1] [2019-01-08 14:32:09,615 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1252415092, now seen corresponding path program 31 times [2019-01-08 14:32:09,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:09,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:09,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:09,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:09,617 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:10,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:10,354 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:10,354 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:10,355 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:10,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:10,355 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 [2019-01-08 14:32:10,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:10,364 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:32:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:10,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:10,416 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 [2019-01-08 14:32:10,416 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:10,425 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:10,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:11,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:12,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:12,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 96 [2019-01-08 14:32:12,446 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:12,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-01-08 14:32:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-01-08 14:32:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-08 14:32:12,448 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 66 states. [2019-01-08 14:32:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:12,660 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-01-08 14:32:12,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-01-08 14:32:12,661 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 96 [2019-01-08 14:32:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:12,662 INFO L225 Difference]: With dead ends: 102 [2019-01-08 14:32:12,662 INFO L226 Difference]: Without dead ends: 101 [2019-01-08 14:32:12,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-08 14:32:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-01-08 14:32:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-01-08 14:32:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-01-08 14:32:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-01-08 14:32:12,668 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 96 [2019-01-08 14:32:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:12,668 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-01-08 14:32:12,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-01-08 14:32:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-01-08 14:32:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-01-08 14:32:12,669 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:12,669 INFO L402 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1] [2019-01-08 14:32:12,669 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash -317063904, now seen corresponding path program 32 times [2019-01-08 14:32:12,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:12,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:12,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:12,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:12,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:13,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:13,376 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:13,376 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:13,376 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:13,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:13,376 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 [2019-01-08 14:32:13,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:32:13,385 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:32:13,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-01-08 14:32:13,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:13,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:13,474 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 [2019-01-08 14:32:13,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:13,486 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:13,486 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:14,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:15,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:15,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 99 [2019-01-08 14:32:15,949 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:15,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-01-08 14:32:15,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-01-08 14:32:15,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-08 14:32:15,951 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 68 states. [2019-01-08 14:32:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:16,207 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-01-08 14:32:16,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-01-08 14:32:16,208 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 99 [2019-01-08 14:32:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:16,209 INFO L225 Difference]: With dead ends: 105 [2019-01-08 14:32:16,209 INFO L226 Difference]: Without dead ends: 104 [2019-01-08 14:32:16,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-08 14:32:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-08 14:32:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-01-08 14:32:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-08 14:32:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-01-08 14:32:16,214 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 99 [2019-01-08 14:32:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:16,215 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-01-08 14:32:16,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-01-08 14:32:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-01-08 14:32:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-01-08 14:32:16,216 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:16,216 INFO L402 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1] [2019-01-08 14:32:16,216 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:16,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1017638644, now seen corresponding path program 33 times [2019-01-08 14:32:16,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:16,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:16,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:16,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:16,217 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:16,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:16,892 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:16,893 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:16,893 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:16,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:16,893 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 [2019-01-08 14:32:16,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:32:16,904 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:32:16,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:32:16,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:16,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:16,966 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 [2019-01-08 14:32:16,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:16,999 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:16,999 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:17,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:19,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:19,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 102 [2019-01-08 14:32:19,317 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:19,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-01-08 14:32:19,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-01-08 14:32:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-08 14:32:19,320 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 70 states. [2019-01-08 14:32:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:19,560 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-01-08 14:32:19,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-01-08 14:32:19,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 102 [2019-01-08 14:32:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:19,562 INFO L225 Difference]: With dead ends: 108 [2019-01-08 14:32:19,562 INFO L226 Difference]: Without dead ends: 107 [2019-01-08 14:32:19,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-08 14:32:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-08 14:32:19,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-01-08 14:32:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-01-08 14:32:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-01-08 14:32:19,567 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 102 [2019-01-08 14:32:19,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:19,567 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-01-08 14:32:19,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-01-08 14:32:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-01-08 14:32:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-01-08 14:32:19,568 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:19,568 INFO L402 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1] [2019-01-08 14:32:19,568 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1701340576, now seen corresponding path program 34 times [2019-01-08 14:32:19,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:19,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:19,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:19,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:19,570 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:20,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:20,538 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:20,538 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:20,538 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:20,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:20,539 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 [2019-01-08 14:32:20,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:20,548 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:32:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:20,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:20,589 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 [2019-01-08 14:32:20,589 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:20,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:20,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:21,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:23,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:23,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 105 [2019-01-08 14:32:23,021 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:23,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-01-08 14:32:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-01-08 14:32:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-08 14:32:23,023 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 72 states. [2019-01-08 14:32:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:23,232 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-01-08 14:32:23,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-01-08 14:32:23,232 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 105 [2019-01-08 14:32:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:23,234 INFO L225 Difference]: With dead ends: 111 [2019-01-08 14:32:23,234 INFO L226 Difference]: Without dead ends: 110 [2019-01-08 14:32:23,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-08 14:32:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-01-08 14:32:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-01-08 14:32:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-01-08 14:32:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-01-08 14:32:23,239 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 105 [2019-01-08 14:32:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:23,239 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-01-08 14:32:23,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-01-08 14:32:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-01-08 14:32:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-01-08 14:32:23,240 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:23,240 INFO L402 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1] [2019-01-08 14:32:23,240 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:23,241 INFO L82 PathProgramCache]: Analyzing trace with hash -271918964, now seen corresponding path program 35 times [2019-01-08 14:32:23,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:23,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:23,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:23,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:23,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:24,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:24,031 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:24,032 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:24,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:24,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:24,032 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 [2019-01-08 14:32:24,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:32:24,040 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:32:24,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-01-08 14:32:24,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:24,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:24,142 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 [2019-01-08 14:32:24,142 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:24,155 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:24,156 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:25,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:26,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:26,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 108 [2019-01-08 14:32:26,947 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:26,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-01-08 14:32:26,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-01-08 14:32:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-08 14:32:26,949 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 74 states. [2019-01-08 14:32:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:27,262 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-01-08 14:32:27,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-01-08 14:32:27,263 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 108 [2019-01-08 14:32:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:27,264 INFO L225 Difference]: With dead ends: 114 [2019-01-08 14:32:27,264 INFO L226 Difference]: Without dead ends: 113 [2019-01-08 14:32:27,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-08 14:32:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-01-08 14:32:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-01-08 14:32:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-01-08 14:32:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-01-08 14:32:27,271 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 108 [2019-01-08 14:32:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:27,271 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-01-08 14:32:27,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-01-08 14:32:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-01-08 14:32:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-01-08 14:32:27,272 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:27,272 INFO L402 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1] [2019-01-08 14:32:27,272 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash -429494752, now seen corresponding path program 36 times [2019-01-08 14:32:27,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:27,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:27,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:27,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:27,274 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:28,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:28,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:28,659 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:28,659 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:28,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:28,659 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 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 [2019-01-08 14:32:28,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:32:28,668 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:32:28,706 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:32:28,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:28,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:28,716 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 [2019-01-08 14:32:28,717 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:28,729 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:28,729 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:29,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:31,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:31,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 111 [2019-01-08 14:32:31,910 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:31,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-01-08 14:32:31,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-01-08 14:32:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-08 14:32:31,912 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 76 states. [2019-01-08 14:32:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:32,154 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-01-08 14:32:32,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-01-08 14:32:32,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 111 [2019-01-08 14:32:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:32,156 INFO L225 Difference]: With dead ends: 117 [2019-01-08 14:32:32,156 INFO L226 Difference]: Without dead ends: 116 [2019-01-08 14:32:32,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-08 14:32:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-01-08 14:32:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-01-08 14:32:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-01-08 14:32:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2019-01-08 14:32:32,162 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 111 [2019-01-08 14:32:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:32,162 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2019-01-08 14:32:32,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-01-08 14:32:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2019-01-08 14:32:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-01-08 14:32:32,163 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:32,163 INFO L402 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1] [2019-01-08 14:32:32,164 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash -370540532, now seen corresponding path program 37 times [2019-01-08 14:32:32,164 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:32,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:32,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:32,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:32,165 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:32,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:32,998 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:32,998 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:32,998 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:32,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:32,998 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 [2019-01-08 14:32:33,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:33,007 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:32:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:33,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:33,047 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 [2019-01-08 14:32:33,047 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:33,055 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:33,056 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:33,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:36,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:36,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 114 [2019-01-08 14:32:36,109 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:36,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-01-08 14:32:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-01-08 14:32:36,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-08 14:32:36,111 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 78 states. [2019-01-08 14:32:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:36,482 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2019-01-08 14:32:36,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-01-08 14:32:36,482 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 114 [2019-01-08 14:32:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:36,483 INFO L225 Difference]: With dead ends: 120 [2019-01-08 14:32:36,483 INFO L226 Difference]: Without dead ends: 119 [2019-01-08 14:32:36,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-08 14:32:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-01-08 14:32:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-01-08 14:32:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-01-08 14:32:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2019-01-08 14:32:36,488 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 114 [2019-01-08 14:32:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:36,489 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2019-01-08 14:32:36,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-01-08 14:32:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2019-01-08 14:32:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-01-08 14:32:36,489 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:36,490 INFO L402 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1] [2019-01-08 14:32:36,490 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -706996576, now seen corresponding path program 38 times [2019-01-08 14:32:36,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:36,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:36,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:36,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:36,491 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:38,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:38,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:38,393 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:38,393 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:38,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:38,393 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 [2019-01-08 14:32:38,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:32:38,402 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:32:38,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-01-08 14:32:38,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:38,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:38,512 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 [2019-01-08 14:32:38,512 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:38,521 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:38,521 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:39,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:41,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:41,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 117 [2019-01-08 14:32:41,816 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:41,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-01-08 14:32:41,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-01-08 14:32:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-08 14:32:41,819 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 80 states. [2019-01-08 14:32:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:42,192 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-01-08 14:32:42,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-01-08 14:32:42,192 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 117 [2019-01-08 14:32:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:42,194 INFO L225 Difference]: With dead ends: 123 [2019-01-08 14:32:42,194 INFO L226 Difference]: Without dead ends: 122 [2019-01-08 14:32:42,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-08 14:32:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-01-08 14:32:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-01-08 14:32:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-01-08 14:32:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-01-08 14:32:42,199 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 117 [2019-01-08 14:32:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:42,199 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-01-08 14:32:42,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-01-08 14:32:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-01-08 14:32:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-01-08 14:32:42,199 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:42,200 INFO L402 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1] [2019-01-08 14:32:42,200 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash 384665484, now seen corresponding path program 39 times [2019-01-08 14:32:42,200 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:42,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:42,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:42,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:42,201 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:43,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:43,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:43,295 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:43,295 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:43,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:43,295 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 [2019-01-08 14:32:43,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:32:43,304 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:32:43,345 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:32:43,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:43,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:43,368 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 [2019-01-08 14:32:43,369 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:43,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:45,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:47,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:47,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 120 [2019-01-08 14:32:47,787 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:47,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-01-08 14:32:47,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-01-08 14:32:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-08 14:32:47,790 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 82 states. [2019-01-08 14:32:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:48,117 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2019-01-08 14:32:48,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-01-08 14:32:48,118 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 120 [2019-01-08 14:32:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:48,119 INFO L225 Difference]: With dead ends: 126 [2019-01-08 14:32:48,119 INFO L226 Difference]: Without dead ends: 125 [2019-01-08 14:32:48,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-08 14:32:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-01-08 14:32:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-01-08 14:32:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-01-08 14:32:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2019-01-08 14:32:48,125 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 120 [2019-01-08 14:32:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:48,125 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2019-01-08 14:32:48,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-01-08 14:32:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2019-01-08 14:32:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-01-08 14:32:48,126 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:48,126 INFO L402 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1] [2019-01-08 14:32:48,126 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash 596729632, now seen corresponding path program 40 times [2019-01-08 14:32:48,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:48,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:48,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:48,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:48,128 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:49,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:49,084 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:49,084 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:49,084 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:49,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:49,084 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 [2019-01-08 14:32:49,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:49,094 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:32:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:49,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:49,143 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 [2019-01-08 14:32:49,143 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:49,154 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:49,154 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:50,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:52,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:52,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2019-01-08 14:32:52,548 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:52,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-01-08 14:32:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-01-08 14:32:52,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-08 14:32:52,551 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 84 states. [2019-01-08 14:32:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:52,924 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2019-01-08 14:32:52,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-01-08 14:32:52,925 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 123 [2019-01-08 14:32:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:52,926 INFO L225 Difference]: With dead ends: 129 [2019-01-08 14:32:52,926 INFO L226 Difference]: Without dead ends: 128 [2019-01-08 14:32:52,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-08 14:32:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-01-08 14:32:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-01-08 14:32:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-01-08 14:32:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2019-01-08 14:32:52,933 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 123 [2019-01-08 14:32:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:52,934 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2019-01-08 14:32:52,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-01-08 14:32:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2019-01-08 14:32:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-01-08 14:32:52,935 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:52,935 INFO L402 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1] [2019-01-08 14:32:52,935 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash 302870284, now seen corresponding path program 41 times [2019-01-08 14:32:52,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:52,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:52,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:32:52,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:52,936 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:53,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:53,892 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:53,892 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:53,892 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:53,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:53,892 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 [2019-01-08 14:32:53,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:32:53,900 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:32:54,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-01-08 14:32:54,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:54,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:54,040 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 [2019-01-08 14:32:54,041 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:54,049 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:54,049 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:32:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:55,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:32:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:57,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:32:57,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 126 [2019-01-08 14:32:57,724 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:32:57,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-01-08 14:32:57,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-01-08 14:32:57,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-08 14:32:57,727 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 86 states. [2019-01-08 14:32:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:32:58,082 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2019-01-08 14:32:58,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-01-08 14:32:58,083 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 126 [2019-01-08 14:32:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:32:58,084 INFO L225 Difference]: With dead ends: 132 [2019-01-08 14:32:58,084 INFO L226 Difference]: Without dead ends: 131 [2019-01-08 14:32:58,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-08 14:32:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-01-08 14:32:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-01-08 14:32:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-01-08 14:32:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2019-01-08 14:32:58,091 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 126 [2019-01-08 14:32:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:32:58,091 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2019-01-08 14:32:58,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-01-08 14:32:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2019-01-08 14:32:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-01-08 14:32:58,092 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:32:58,092 INFO L402 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1] [2019-01-08 14:32:58,092 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:32:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:32:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -917616736, now seen corresponding path program 42 times [2019-01-08 14:32:58,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:32:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:58,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:32:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:32:58,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:32:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:32:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:32:59,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:59,764 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:32:59,765 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:32:59,765 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:32:59,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:32:59,765 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 [2019-01-08 14:32:59,773 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:32:59,773 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:32:59,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:32:59,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:32:59,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:32:59,822 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 [2019-01-08 14:32:59,822 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:32:59,836 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:32:59,836 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:01,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:03,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:03,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 129 [2019-01-08 14:33:03,573 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:03,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-01-08 14:33:03,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-01-08 14:33:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-01-08 14:33:03,575 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 88 states. [2019-01-08 14:33:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:04,102 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2019-01-08 14:33:04,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-01-08 14:33:04,102 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 129 [2019-01-08 14:33:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:04,103 INFO L225 Difference]: With dead ends: 135 [2019-01-08 14:33:04,103 INFO L226 Difference]: Without dead ends: 134 [2019-01-08 14:33:04,105 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 [2019-01-08 14:33:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-08 14:33:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-01-08 14:33:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-01-08 14:33:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2019-01-08 14:33:04,110 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 129 [2019-01-08 14:33:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:04,111 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2019-01-08 14:33:04,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-01-08 14:33:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2019-01-08 14:33:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-01-08 14:33:04,112 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:04,112 INFO L402 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1] [2019-01-08 14:33:04,112 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash 746698380, now seen corresponding path program 43 times [2019-01-08 14:33:04,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:04,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:04,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:33:04,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:04,113 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:06,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:06,821 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:06,822 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:06,822 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:06,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:06,822 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 [2019-01-08 14:33:06,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:06,830 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:33:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:06,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:06,880 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 [2019-01-08 14:33:06,880 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:06,892 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:06,892 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:08,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:10,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:10,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 132 [2019-01-08 14:33:10,492 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:10,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-01-08 14:33:10,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-01-08 14:33:10,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-08 14:33:10,494 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 90 states. [2019-01-08 14:33:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:10,762 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2019-01-08 14:33:10,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-01-08 14:33:10,763 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 132 [2019-01-08 14:33:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:10,764 INFO L225 Difference]: With dead ends: 138 [2019-01-08 14:33:10,764 INFO L226 Difference]: Without dead ends: 137 [2019-01-08 14:33:10,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-08 14:33:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-01-08 14:33:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-01-08 14:33:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-01-08 14:33:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2019-01-08 14:33:10,771 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 132 [2019-01-08 14:33:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:10,771 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2019-01-08 14:33:10,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-01-08 14:33:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2019-01-08 14:33:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-01-08 14:33:10,772 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:10,772 INFO L402 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1] [2019-01-08 14:33:10,772 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1255854112, now seen corresponding path program 44 times [2019-01-08 14:33:10,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:10,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:10,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:10,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:10,773 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:12,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:12,351 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:12,352 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:12,352 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:12,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:12,352 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 [2019-01-08 14:33:12,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:33:12,361 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:33:12,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-01-08 14:33:12,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:33:12,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:12,499 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 [2019-01-08 14:33:12,500 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:12,507 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:12,507 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:13,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:16,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:16,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 135 [2019-01-08 14:33:16,563 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:16,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-01-08 14:33:16,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-01-08 14:33:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-08 14:33:16,565 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 92 states. [2019-01-08 14:33:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:16,864 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2019-01-08 14:33:16,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-01-08 14:33:16,866 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 135 [2019-01-08 14:33:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:16,867 INFO L225 Difference]: With dead ends: 141 [2019-01-08 14:33:16,867 INFO L226 Difference]: Without dead ends: 140 [2019-01-08 14:33:16,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-08 14:33:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-01-08 14:33:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-01-08 14:33:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-01-08 14:33:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2019-01-08 14:33:16,873 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 135 [2019-01-08 14:33:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:16,873 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2019-01-08 14:33:16,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-01-08 14:33:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2019-01-08 14:33:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-01-08 14:33:16,874 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:16,874 INFO L402 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1] [2019-01-08 14:33:16,874 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash -310223348, now seen corresponding path program 45 times [2019-01-08 14:33:16,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:16,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:16,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:33:16,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:16,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:18,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:18,334 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:18,334 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:18,334 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:18,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:18,335 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 [2019-01-08 14:33:18,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:33:18,345 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:33:18,391 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:33:18,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:33:18,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:18,415 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 [2019-01-08 14:33:18,416 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:18,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:18,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:19,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:22,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:22,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 138 [2019-01-08 14:33:22,704 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:22,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-01-08 14:33:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-01-08 14:33:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-08 14:33:22,705 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 94 states. [2019-01-08 14:33:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:23,115 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2019-01-08 14:33:23,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-01-08 14:33:23,116 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 138 [2019-01-08 14:33:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:23,117 INFO L225 Difference]: With dead ends: 144 [2019-01-08 14:33:23,117 INFO L226 Difference]: Without dead ends: 143 [2019-01-08 14:33:23,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-08 14:33:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-08 14:33:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-01-08 14:33:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-01-08 14:33:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2019-01-08 14:33:23,125 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 138 [2019-01-08 14:33:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:23,126 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2019-01-08 14:33:23,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-01-08 14:33:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2019-01-08 14:33:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-01-08 14:33:23,127 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:23,127 INFO L402 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1] [2019-01-08 14:33:23,127 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash 905902240, now seen corresponding path program 46 times [2019-01-08 14:33:23,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:23,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:23,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:33:23,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:23,129 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:24,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:24,238 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:24,239 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:24,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:24,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:24,239 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 [2019-01-08 14:33:24,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:24,249 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:33:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:24,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:24,301 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 [2019-01-08 14:33:24,302 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:24,315 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:24,315 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:25,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:29,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:29,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 141 [2019-01-08 14:33:29,066 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:29,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-01-08 14:33:29,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-01-08 14:33:29,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-08 14:33:29,068 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 96 states. [2019-01-08 14:33:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:29,441 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2019-01-08 14:33:29,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-01-08 14:33:29,441 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 141 [2019-01-08 14:33:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:29,443 INFO L225 Difference]: With dead ends: 147 [2019-01-08 14:33:29,443 INFO L226 Difference]: Without dead ends: 146 [2019-01-08 14:33:29,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-08 14:33:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-08 14:33:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-01-08 14:33:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-08 14:33:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2019-01-08 14:33:29,449 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 141 [2019-01-08 14:33:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:29,450 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2019-01-08 14:33:29,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-01-08 14:33:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2019-01-08 14:33:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-01-08 14:33:29,450 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:29,451 INFO L402 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1] [2019-01-08 14:33:29,451 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1840814708, now seen corresponding path program 47 times [2019-01-08 14:33:29,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:29,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:29,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:29,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:29,452 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:30,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:30,622 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:30,622 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:30,622 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:30,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:30,622 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 [2019-01-08 14:33:30,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:33:30,631 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:33:30,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-01-08 14:33:30,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:33:30,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:30,780 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 [2019-01-08 14:33:30,780 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:30,791 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:30,792 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:32,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:35,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:35,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 144 [2019-01-08 14:33:35,329 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:35,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-01-08 14:33:35,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-01-08 14:33:35,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-08 14:33:35,330 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 98 states. [2019-01-08 14:33:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:35,679 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2019-01-08 14:33:35,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-01-08 14:33:35,680 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 144 [2019-01-08 14:33:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:35,681 INFO L225 Difference]: With dead ends: 150 [2019-01-08 14:33:35,681 INFO L226 Difference]: Without dead ends: 149 [2019-01-08 14:33:35,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-08 14:33:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-01-08 14:33:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-01-08 14:33:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-01-08 14:33:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2019-01-08 14:33:35,688 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 144 [2019-01-08 14:33:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:35,688 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2019-01-08 14:33:35,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-01-08 14:33:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2019-01-08 14:33:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-01-08 14:33:35,689 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:35,689 INFO L402 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1] [2019-01-08 14:33:35,689 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:35,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:35,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1568489184, now seen corresponding path program 48 times [2019-01-08 14:33:35,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:35,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:35,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:33:35,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:35,691 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:37,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:37,226 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:37,226 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:37,226 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:37,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:37,226 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 [2019-01-08 14:33:37,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:33:37,235 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:33:37,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:33:37,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:33:37,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:37,303 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 [2019-01-08 14:33:37,304 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:37,398 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:37,399 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:38,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:42,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:42,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 147 [2019-01-08 14:33:42,041 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:42,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-01-08 14:33:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-01-08 14:33:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-08 14:33:42,043 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 100 states. [2019-01-08 14:33:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:42,520 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2019-01-08 14:33:42,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-01-08 14:33:42,521 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 147 [2019-01-08 14:33:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:42,522 INFO L225 Difference]: With dead ends: 153 [2019-01-08 14:33:42,522 INFO L226 Difference]: Without dead ends: 152 [2019-01-08 14:33:42,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-08 14:33:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-08 14:33:42,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2019-01-08 14:33:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-01-08 14:33:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2019-01-08 14:33:42,527 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 147 [2019-01-08 14:33:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:42,527 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2019-01-08 14:33:42,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-01-08 14:33:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2019-01-08 14:33:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-01-08 14:33:42,528 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:42,528 INFO L402 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1] [2019-01-08 14:33:42,528 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1912025844, now seen corresponding path program 49 times [2019-01-08 14:33:42,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:42,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:42,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:33:42,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:42,529 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:43,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:43,765 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:43,765 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:43,765 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:43,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:43,765 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 [2019-01-08 14:33:43,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:43,774 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:33:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:43,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:43,823 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 [2019-01-08 14:33:43,823 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:43,834 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:43,834 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:45,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:48,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:48,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 150 [2019-01-08 14:33:48,806 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:48,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-01-08 14:33:48,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-01-08 14:33:48,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-08 14:33:48,808 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 102 states. [2019-01-08 14:33:49,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:49,152 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2019-01-08 14:33:49,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-01-08 14:33:49,153 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 150 [2019-01-08 14:33:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:49,154 INFO L225 Difference]: With dead ends: 156 [2019-01-08 14:33:49,154 INFO L226 Difference]: Without dead ends: 155 [2019-01-08 14:33:49,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-08 14:33:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-01-08 14:33:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-01-08 14:33:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-01-08 14:33:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2019-01-08 14:33:49,161 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 150 [2019-01-08 14:33:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:49,161 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2019-01-08 14:33:49,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-01-08 14:33:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2019-01-08 14:33:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-01-08 14:33:49,162 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:49,162 INFO L402 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1] [2019-01-08 14:33:49,162 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1305597536, now seen corresponding path program 50 times [2019-01-08 14:33:49,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:49,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:49,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:33:49,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:49,164 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:50,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:50,585 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:50,585 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:50,586 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:50,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:50,586 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 [2019-01-08 14:33:50,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:33:50,595 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:33:50,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-01-08 14:33:50,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:33:50,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:50,772 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 [2019-01-08 14:33:50,773 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:50,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:50,784 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:52,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:33:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:55,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:33:55,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2019-01-08 14:33:55,801 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:33:55,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-01-08 14:33:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-01-08 14:33:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-08 14:33:55,804 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 104 states. [2019-01-08 14:33:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:33:56,126 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2019-01-08 14:33:56,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-01-08 14:33:56,127 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 153 [2019-01-08 14:33:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:33:56,128 INFO L225 Difference]: With dead ends: 159 [2019-01-08 14:33:56,128 INFO L226 Difference]: Without dead ends: 158 [2019-01-08 14:33:56,130 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10397 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-08 14:33:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-01-08 14:33:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-01-08 14:33:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-01-08 14:33:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2019-01-08 14:33:56,134 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 153 [2019-01-08 14:33:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:33:56,134 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2019-01-08 14:33:56,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-01-08 14:33:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2019-01-08 14:33:56,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-01-08 14:33:56,135 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:33:56,135 INFO L402 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1] [2019-01-08 14:33:56,135 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:33:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:33:56,135 INFO L82 PathProgramCache]: Analyzing trace with hash 167679116, now seen corresponding path program 51 times [2019-01-08 14:33:56,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:33:56,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:56,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:33:56,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:33:56,136 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:33:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:33:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:57,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:57,873 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:33:57,873 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:33:57,873 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:33:57,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:33:57,873 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 [2019-01-08 14:33:57,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:33:57,882 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:33:57,933 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:33:57,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:33:57,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:33:57,942 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 [2019-01-08 14:33:57,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:33:57,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:33:57,964 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:33:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:33:59,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:03,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:03,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 152 [2019-01-08 14:34:03,252 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:03,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-01-08 14:34:03,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-01-08 14:34:03,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-08 14:34:03,254 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 106 states. [2019-01-08 14:34:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:03,632 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2019-01-08 14:34:03,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-01-08 14:34:03,633 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 156 [2019-01-08 14:34:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:03,634 INFO L225 Difference]: With dead ends: 162 [2019-01-08 14:34:03,634 INFO L226 Difference]: Without dead ends: 161 [2019-01-08 14:34:03,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-08 14:34:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-01-08 14:34:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-01-08 14:34:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-01-08 14:34:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2019-01-08 14:34:03,640 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 156 [2019-01-08 14:34:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:03,640 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2019-01-08 14:34:03,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-01-08 14:34:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2019-01-08 14:34:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-01-08 14:34:03,641 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:03,641 INFO L402 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1] [2019-01-08 14:34:03,641 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 281621024, now seen corresponding path program 52 times [2019-01-08 14:34:03,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:03,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:03,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:34:03,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:03,643 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:05,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:05,108 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:05,109 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:34:05,109 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:34:05,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:05,109 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 [2019-01-08 14:34:05,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:05,117 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:34:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:05,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:05,171 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 [2019-01-08 14:34:05,171 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:05,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:05,184 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:34:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:06,888 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:10,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:10,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2019-01-08 14:34:10,449 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:10,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-01-08 14:34:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-01-08 14:34:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-08 14:34:10,452 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 108 states. [2019-01-08 14:34:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:10,888 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2019-01-08 14:34:10,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-01-08 14:34:10,889 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 159 [2019-01-08 14:34:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:10,890 INFO L225 Difference]: With dead ends: 165 [2019-01-08 14:34:10,890 INFO L226 Difference]: Without dead ends: 164 [2019-01-08 14:34:10,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 210 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11391 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-08 14:34:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-01-08 14:34:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-01-08 14:34:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-01-08 14:34:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2019-01-08 14:34:10,896 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 159 [2019-01-08 14:34:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:10,897 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2019-01-08 14:34:10,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-01-08 14:34:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2019-01-08 14:34:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-01-08 14:34:10,897 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:10,897 INFO L402 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1] [2019-01-08 14:34:10,898 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:10,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1700838412, now seen corresponding path program 53 times [2019-01-08 14:34:10,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:10,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:10,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:10,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:10,899 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:12,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:12,317 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:12,317 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:34:12,317 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:34:12,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:12,317 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 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 [2019-01-08 14:34:12,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:34:12,327 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:34:12,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-01-08 14:34:12,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:34:12,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:12,516 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 [2019-01-08 14:34:12,516 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:12,525 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:12,525 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:34:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:15,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:18,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:18,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 154 [2019-01-08 14:34:18,953 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:18,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-01-08 14:34:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-01-08 14:34:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-08 14:34:18,954 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 110 states. [2019-01-08 14:34:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:19,373 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2019-01-08 14:34:19,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-01-08 14:34:19,373 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 162 [2019-01-08 14:34:19,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:19,375 INFO L225 Difference]: With dead ends: 168 [2019-01-08 14:34:19,375 INFO L226 Difference]: Without dead ends: 167 [2019-01-08 14:34:19,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 214 SyntacticMatches, 8 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11888 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-08 14:34:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-01-08 14:34:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2019-01-08 14:34:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-01-08 14:34:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2019-01-08 14:34:19,381 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 162 [2019-01-08 14:34:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:19,382 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2019-01-08 14:34:19,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-01-08 14:34:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2019-01-08 14:34:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-01-08 14:34:19,383 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:19,383 INFO L402 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1] [2019-01-08 14:34:19,383 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1947982496, now seen corresponding path program 54 times [2019-01-08 14:34:19,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:19,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:19,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:34:19,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:19,384 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:20,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:20,809 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:20,809 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:34:20,809 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:34:20,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:20,810 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 [2019-01-08 14:34:20,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:34:20,819 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:34:20,876 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:34:20,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:34:20,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:20,901 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 [2019-01-08 14:34:20,901 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:20,976 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:20,977 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:34:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:22,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:26,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:26,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 155 [2019-01-08 14:34:26,360 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:26,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-01-08 14:34:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-01-08 14:34:26,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-01-08 14:34:26,363 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 112 states. [2019-01-08 14:34:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:26,760 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2019-01-08 14:34:26,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-01-08 14:34:26,760 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 165 [2019-01-08 14:34:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:26,762 INFO L225 Difference]: With dead ends: 171 [2019-01-08 14:34:26,762 INFO L226 Difference]: Without dead ends: 170 [2019-01-08 14:34:26,763 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 [2019-01-08 14:34:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-01-08 14:34:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-01-08 14:34:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-01-08 14:34:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2019-01-08 14:34:26,768 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 165 [2019-01-08 14:34:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:26,768 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2019-01-08 14:34:26,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-01-08 14:34:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2019-01-08 14:34:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-01-08 14:34:26,769 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:26,769 INFO L402 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1] [2019-01-08 14:34:26,770 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:26,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1251523700, now seen corresponding path program 55 times [2019-01-08 14:34:26,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:26,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:26,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:34:26,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:26,771 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:28,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:28,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:28,691 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:34:28,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:34:28,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:28,691 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 [2019-01-08 14:34:28,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:28,701 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:34:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:28,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:28,760 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 [2019-01-08 14:34:28,760 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:28,772 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:28,772 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:34:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:30,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:34,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:34,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 156 [2019-01-08 14:34:34,485 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:34,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-01-08 14:34:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-01-08 14:34:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-08 14:34:34,487 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 114 states. [2019-01-08 14:34:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:34,872 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2019-01-08 14:34:34,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-01-08 14:34:34,872 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 168 [2019-01-08 14:34:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:34,873 INFO L225 Difference]: With dead ends: 174 [2019-01-08 14:34:34,873 INFO L226 Difference]: Without dead ends: 173 [2019-01-08 14:34:34,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 222 SyntacticMatches, 12 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-08 14:34:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-01-08 14:34:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2019-01-08 14:34:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-01-08 14:34:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2019-01-08 14:34:34,879 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 168 [2019-01-08 14:34:34,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:34,879 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2019-01-08 14:34:34,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-01-08 14:34:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2019-01-08 14:34:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-01-08 14:34:34,880 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:34,880 INFO L402 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1] [2019-01-08 14:34:34,880 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash 468591392, now seen corresponding path program 56 times [2019-01-08 14:34:34,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:34,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:34,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:34,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:34,881 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:36,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:36,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:36,433 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:34:36,433 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:34:36,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:36,433 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 [2019-01-08 14:34:36,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:34:36,444 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:34:36,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-01-08 14:34:36,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:34:36,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:36,665 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 [2019-01-08 14:34:36,665 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:36,673 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:36,674 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:34:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:38,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:42,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:42,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 157 [2019-01-08 14:34:42,400 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:42,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-01-08 14:34:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-01-08 14:34:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-08 14:34:42,402 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 116 states. [2019-01-08 14:34:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:42,816 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2019-01-08 14:34:42,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-01-08 14:34:42,816 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 171 [2019-01-08 14:34:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:42,817 INFO L225 Difference]: With dead ends: 177 [2019-01-08 14:34:42,817 INFO L226 Difference]: Without dead ends: 176 [2019-01-08 14:34:42,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 226 SyntacticMatches, 14 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13379 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-08 14:34:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-01-08 14:34:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2019-01-08 14:34:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-01-08 14:34:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2019-01-08 14:34:42,822 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 171 [2019-01-08 14:34:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:42,822 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2019-01-08 14:34:42,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-01-08 14:34:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2019-01-08 14:34:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-01-08 14:34:42,823 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:42,823 INFO L402 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1] [2019-01-08 14:34:42,823 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1162488588, now seen corresponding path program 57 times [2019-01-08 14:34:42,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:42,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:42,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:34:42,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:42,825 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:44,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:44,696 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:44,696 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:34:44,696 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:34:44,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:44,696 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 [2019-01-08 14:34:44,705 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:34:44,705 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:34:44,763 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:34:44,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:34:44,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:44,776 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 [2019-01-08 14:34:44,776 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:44,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:44,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:34:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:46,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:50,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:50,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 158 [2019-01-08 14:34:50,530 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:50,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-01-08 14:34:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-01-08 14:34:50,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-08 14:34:50,533 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 118 states. [2019-01-08 14:34:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:50,974 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2019-01-08 14:34:50,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-01-08 14:34:50,974 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 174 [2019-01-08 14:34:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:50,976 INFO L225 Difference]: With dead ends: 180 [2019-01-08 14:34:50,976 INFO L226 Difference]: Without dead ends: 179 [2019-01-08 14:34:50,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 230 SyntacticMatches, 16 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13876 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-08 14:34:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-01-08 14:34:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-01-08 14:34:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-01-08 14:34:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2019-01-08 14:34:50,982 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 174 [2019-01-08 14:34:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:50,982 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2019-01-08 14:34:50,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-01-08 14:34:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2019-01-08 14:34:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-01-08 14:34:50,983 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:50,983 INFO L402 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1] [2019-01-08 14:34:50,983 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1376258976, now seen corresponding path program 58 times [2019-01-08 14:34:50,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:50,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:50,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:34:50,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:50,984 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:52,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:52,656 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:34:52,656 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:34:52,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:34:52,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:34:52,656 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 [2019-01-08 14:34:52,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:52,667 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:34:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:34:52,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:34:52,728 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 [2019-01-08 14:34:52,728 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:34:52,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:34:52,736 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:34:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:55,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:34:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:34:58,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:34:58,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 159 [2019-01-08 14:34:58,580 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:34:58,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2019-01-08 14:34:58,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2019-01-08 14:34:58,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-08 14:34:58,582 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 120 states. [2019-01-08 14:34:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:34:59,088 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2019-01-08 14:34:59,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-01-08 14:34:59,088 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 177 [2019-01-08 14:34:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:34:59,089 INFO L225 Difference]: With dead ends: 183 [2019-01-08 14:34:59,089 INFO L226 Difference]: Without dead ends: 182 [2019-01-08 14:34:59,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 234 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14373 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-08 14:34:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-01-08 14:34:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-01-08 14:34:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-01-08 14:34:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2019-01-08 14:34:59,095 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 177 [2019-01-08 14:34:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:34:59,095 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2019-01-08 14:34:59,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2019-01-08 14:34:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2019-01-08 14:34:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-01-08 14:34:59,096 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:34:59,097 INFO L402 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1] [2019-01-08 14:34:59,097 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:34:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:34:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash 373387916, now seen corresponding path program 59 times [2019-01-08 14:34:59,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:34:59,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:59,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:34:59,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:34:59,098 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:34:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:00,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:00,785 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:35:00,785 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:35:00,785 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:35:00,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:00,786 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 [2019-01-08 14:35:00,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:35:00,794 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:35:01,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-01-08 14:35:01,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:35:01,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:35:01,228 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 [2019-01-08 14:35:01,228 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:35:01,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:35:01,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:35:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:03,393 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:35:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:07,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:35:07,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 160 [2019-01-08 14:35:07,279 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:35:07,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2019-01-08 14:35:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2019-01-08 14:35:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-08 14:35:07,281 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 122 states. [2019-01-08 14:35:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:35:07,682 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2019-01-08 14:35:07,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-01-08 14:35:07,683 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 180 [2019-01-08 14:35:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:35:07,684 INFO L225 Difference]: With dead ends: 186 [2019-01-08 14:35:07,684 INFO L226 Difference]: Without dead ends: 185 [2019-01-08 14:35:07,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 238 SyntacticMatches, 20 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14870 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-08 14:35:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-01-08 14:35:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-01-08 14:35:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-01-08 14:35:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2019-01-08 14:35:07,691 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 180 [2019-01-08 14:35:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:35:07,692 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2019-01-08 14:35:07,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2019-01-08 14:35:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2019-01-08 14:35:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-01-08 14:35:07,693 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:35:07,693 INFO L402 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1] [2019-01-08 14:35:07,693 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:35:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:35:07,694 INFO L82 PathProgramCache]: Analyzing trace with hash -365849568, now seen corresponding path program 60 times [2019-01-08 14:35:07,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:35:07,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:07,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:35:07,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:07,695 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:35:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:09,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:09,751 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:35:09,751 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:35:09,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:35:09,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:09,751 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 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 [2019-01-08 14:35:09,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:35:09,760 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:35:09,820 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:35:09,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:35:09,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:35:09,845 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 [2019-01-08 14:35:09,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:35:09,882 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:35:09,883 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:35:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:12,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:35:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:15,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:35:15,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 161 [2019-01-08 14:35:15,863 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:35:15,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-01-08 14:35:15,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-01-08 14:35:15,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-08 14:35:15,866 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 124 states. [2019-01-08 14:35:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:35:16,335 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2019-01-08 14:35:16,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-01-08 14:35:16,336 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 183 [2019-01-08 14:35:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:35:16,337 INFO L225 Difference]: With dead ends: 189 [2019-01-08 14:35:16,337 INFO L226 Difference]: Without dead ends: 188 [2019-01-08 14:35:16,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 242 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15367 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-08 14:35:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-01-08 14:35:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2019-01-08 14:35:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-01-08 14:35:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2019-01-08 14:35:16,342 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 183 [2019-01-08 14:35:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:35:16,342 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2019-01-08 14:35:16,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-01-08 14:35:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2019-01-08 14:35:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-01-08 14:35:16,343 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:35:16,343 INFO L402 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1] [2019-01-08 14:35:16,344 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:35:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:35:16,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1602558476, now seen corresponding path program 61 times [2019-01-08 14:35:16,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:35:16,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:16,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:35:16,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:16,344 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:35:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:18,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:18,251 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:35:18,251 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:35:18,251 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:35:18,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:18,251 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 [2019-01-08 14:35:18,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:35:18,260 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:35:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:18,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:35:18,324 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 [2019-01-08 14:35:18,324 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:35:18,335 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:35:18,335 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:35:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:20,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:35:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:24,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:35:24,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 162 [2019-01-08 14:35:24,637 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:35:24,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-01-08 14:35:24,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-01-08 14:35:24,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-08 14:35:24,640 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 126 states. [2019-01-08 14:35:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:35:25,166 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2019-01-08 14:35:25,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-01-08 14:35:25,166 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 186 [2019-01-08 14:35:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:35:25,167 INFO L225 Difference]: With dead ends: 192 [2019-01-08 14:35:25,168 INFO L226 Difference]: Without dead ends: 191 [2019-01-08 14:35:25,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 246 SyntacticMatches, 24 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15864 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-08 14:35:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-01-08 14:35:25,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-01-08 14:35:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-01-08 14:35:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2019-01-08 14:35:25,172 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 186 [2019-01-08 14:35:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:35:25,172 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2019-01-08 14:35:25,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-01-08 14:35:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2019-01-08 14:35:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-01-08 14:35:25,173 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:35:25,173 INFO L402 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1] [2019-01-08 14:35:25,173 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:35:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:35:25,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1036862304, now seen corresponding path program 62 times [2019-01-08 14:35:25,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:35:25,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:25,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:35:25,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:25,175 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:35:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:27,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:27,021 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:35:27,021 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:35:27,022 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:35:27,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:27,022 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 [2019-01-08 14:35:27,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:35:27,031 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:35:27,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2019-01-08 14:35:27,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:35:27,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:35:27,287 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 [2019-01-08 14:35:27,287 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:35:27,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:35:27,300 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:35:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:29,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:35:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:33,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:35:33,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 163 [2019-01-08 14:35:33,556 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:35:33,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2019-01-08 14:35:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2019-01-08 14:35:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-08 14:35:33,558 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 128 states. [2019-01-08 14:35:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:35:34,058 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2019-01-08 14:35:34,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-01-08 14:35:34,059 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 189 [2019-01-08 14:35:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:35:34,060 INFO L225 Difference]: With dead ends: 195 [2019-01-08 14:35:34,060 INFO L226 Difference]: Without dead ends: 194 [2019-01-08 14:35:34,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 250 SyntacticMatches, 26 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16361 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-08 14:35:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-01-08 14:35:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2019-01-08 14:35:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-01-08 14:35:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2019-01-08 14:35:34,065 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 189 [2019-01-08 14:35:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:35:34,065 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2019-01-08 14:35:34,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2019-01-08 14:35:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2019-01-08 14:35:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-01-08 14:35:34,066 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:35:34,066 INFO L402 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1] [2019-01-08 14:35:34,066 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:35:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:35:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash 239935884, now seen corresponding path program 63 times [2019-01-08 14:35:34,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:35:34,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:34,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:35:34,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:34,068 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:35:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:36,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:36,422 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:35:36,423 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:35:36,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:35:36,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:36,423 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 [2019-01-08 14:35:36,433 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:35:36,433 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:35:36,498 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:35:36,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:35:36,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:35:36,507 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 [2019-01-08 14:35:36,507 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:35:36,519 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:35:36,519 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:35:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:38,897 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:35:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:42,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:35:42,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 164 [2019-01-08 14:35:42,913 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:35:42,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-01-08 14:35:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-01-08 14:35:42,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-08 14:35:42,915 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 130 states. [2019-01-08 14:35:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:35:43,451 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2019-01-08 14:35:43,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-01-08 14:35:43,451 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 192 [2019-01-08 14:35:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:35:43,453 INFO L225 Difference]: With dead ends: 198 [2019-01-08 14:35:43,453 INFO L226 Difference]: Without dead ends: 197 [2019-01-08 14:35:43,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 254 SyntacticMatches, 28 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16858 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-08 14:35:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-01-08 14:35:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-01-08 14:35:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-01-08 14:35:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2019-01-08 14:35:43,459 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 192 [2019-01-08 14:35:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:35:43,460 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2019-01-08 14:35:43,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-01-08 14:35:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2019-01-08 14:35:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-01-08 14:35:43,461 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:35:43,461 INFO L402 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1] [2019-01-08 14:35:43,461 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:35:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:35:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1104381216, now seen corresponding path program 64 times [2019-01-08 14:35:43,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:35:43,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:43,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:35:43,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:43,463 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:35:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:45,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:45,730 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:35:45,730 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:35:45,730 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:35:45,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:45,731 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 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 [2019-01-08 14:35:45,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:35:45,740 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:35:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:45,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:35:45,812 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 [2019-01-08 14:35:45,813 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:35:45,829 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:35:45,830 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:35:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:48,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:35:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:52,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:35:52,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 165 [2019-01-08 14:35:52,293 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:35:52,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-01-08 14:35:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-01-08 14:35:52,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-08 14:35:52,295 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 132 states. [2019-01-08 14:35:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:35:52,767 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2019-01-08 14:35:52,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-01-08 14:35:52,768 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 195 [2019-01-08 14:35:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:35:52,769 INFO L225 Difference]: With dead ends: 201 [2019-01-08 14:35:52,769 INFO L226 Difference]: Without dead ends: 200 [2019-01-08 14:35:52,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 258 SyntacticMatches, 30 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17355 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-08 14:35:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-01-08 14:35:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2019-01-08 14:35:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-01-08 14:35:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2019-01-08 14:35:52,776 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 195 [2019-01-08 14:35:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:35:52,776 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2019-01-08 14:35:52,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-01-08 14:35:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2019-01-08 14:35:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-01-08 14:35:52,778 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:35:52,778 INFO L402 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1] [2019-01-08 14:35:52,778 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:35:52,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:35:52,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1171360012, now seen corresponding path program 65 times [2019-01-08 14:35:52,779 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:35:52,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:52,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:35:52,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:35:52,779 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:35:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:35:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:54,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:54,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:35:54,865 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:35:54,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:35:54,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:35:54,866 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 [2019-01-08 14:35:54,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:35:54,875 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:35:55,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2019-01-08 14:35:55,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:35:55,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:35:55,167 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 [2019-01-08 14:35:55,167 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:35:55,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:35:55,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:35:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:35:57,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:01,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:01,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 166 [2019-01-08 14:36:01,854 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:01,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2019-01-08 14:36:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2019-01-08 14:36:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-08 14:36:01,857 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 134 states. [2019-01-08 14:36:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:02,332 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2019-01-08 14:36:02,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-01-08 14:36:02,333 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 198 [2019-01-08 14:36:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:02,334 INFO L225 Difference]: With dead ends: 204 [2019-01-08 14:36:02,334 INFO L226 Difference]: Without dead ends: 203 [2019-01-08 14:36:02,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 262 SyntacticMatches, 32 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17852 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-08 14:36:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-01-08 14:36:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2019-01-08 14:36:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-01-08 14:36:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2019-01-08 14:36:02,340 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 198 [2019-01-08 14:36:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:02,340 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2019-01-08 14:36:02,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2019-01-08 14:36:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2019-01-08 14:36:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-01-08 14:36:02,342 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:02,342 INFO L402 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1] [2019-01-08 14:36:02,342 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash -623120992, now seen corresponding path program 66 times [2019-01-08 14:36:02,342 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:02,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:02,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:36:02,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:02,343 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:04,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:04,471 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:04,471 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:36:04,472 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:36:04,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:04,472 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 [2019-01-08 14:36:04,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:36:04,481 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:36:04,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:36:04,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:36:04,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:04,577 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 [2019-01-08 14:36:04,578 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:04,588 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:04,588 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:36:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:07,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:11,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:11,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 167 [2019-01-08 14:36:11,526 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:11,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-01-08 14:36:11,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-01-08 14:36:11,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-08 14:36:11,529 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 136 states. [2019-01-08 14:36:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:12,074 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2019-01-08 14:36:12,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-01-08 14:36:12,075 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 201 [2019-01-08 14:36:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:12,076 INFO L225 Difference]: With dead ends: 207 [2019-01-08 14:36:12,076 INFO L226 Difference]: Without dead ends: 206 [2019-01-08 14:36:12,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 266 SyntacticMatches, 34 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18349 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-08 14:36:12,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-01-08 14:36:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2019-01-08 14:36:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-01-08 14:36:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2019-01-08 14:36:12,082 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 201 [2019-01-08 14:36:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:12,082 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2019-01-08 14:36:12,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-01-08 14:36:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2019-01-08 14:36:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-01-08 14:36:12,083 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:12,083 INFO L402 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1] [2019-01-08 14:36:12,083 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash -548777844, now seen corresponding path program 67 times [2019-01-08 14:36:12,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:12,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:12,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:36:12,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:12,084 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:14,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:14,328 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:14,328 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:36:14,328 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:36:14,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:14,328 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 [2019-01-08 14:36:14,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:14,336 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:14,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:14,407 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 [2019-01-08 14:36:14,407 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:14,419 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:14,419 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:36:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:17,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:21,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:21,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 168 [2019-01-08 14:36:21,407 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:21,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-01-08 14:36:21,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-01-08 14:36:21,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-08 14:36:21,409 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 138 states. [2019-01-08 14:36:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:21,853 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2019-01-08 14:36:21,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-01-08 14:36:21,853 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 204 [2019-01-08 14:36:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:21,854 INFO L225 Difference]: With dead ends: 210 [2019-01-08 14:36:21,854 INFO L226 Difference]: Without dead ends: 209 [2019-01-08 14:36:21,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 270 SyntacticMatches, 36 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18846 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-08 14:36:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-01-08 14:36:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2019-01-08 14:36:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-01-08 14:36:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2019-01-08 14:36:21,860 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 204 [2019-01-08 14:36:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:21,860 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2019-01-08 14:36:21,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2019-01-08 14:36:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2019-01-08 14:36:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-01-08 14:36:21,861 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:21,861 INFO L402 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1] [2019-01-08 14:36:21,861 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1995180512, now seen corresponding path program 68 times [2019-01-08 14:36:21,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:21,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:21,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:21,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:21,862 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:24,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:24,039 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:24,039 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:36:24,039 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:36:24,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:24,039 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 [2019-01-08 14:36:24,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:36:24,047 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:36:24,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2019-01-08 14:36:24,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:36:24,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:24,354 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 [2019-01-08 14:36:24,354 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,371 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:36:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:27,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:31,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:31,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 169 [2019-01-08 14:36:31,461 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:31,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2019-01-08 14:36:31,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2019-01-08 14:36:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-08 14:36:31,463 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 140 states. [2019-01-08 14:36:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:32,022 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2019-01-08 14:36:32,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-01-08 14:36:32,022 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 207 [2019-01-08 14:36:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:32,023 INFO L225 Difference]: With dead ends: 213 [2019-01-08 14:36:32,024 INFO L226 Difference]: Without dead ends: 212 [2019-01-08 14:36:32,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 274 SyntacticMatches, 38 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19343 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-08 14:36:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-01-08 14:36:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-01-08 14:36:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-01-08 14:36:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2019-01-08 14:36:32,031 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 207 [2019-01-08 14:36:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:32,031 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2019-01-08 14:36:32,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2019-01-08 14:36:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2019-01-08 14:36:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-01-08 14:36:32,032 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:32,033 INFO L402 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1] [2019-01-08 14:36:32,033 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:32,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:32,033 INFO L82 PathProgramCache]: Analyzing trace with hash -370182132, now seen corresponding path program 69 times [2019-01-08 14:36:32,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:32,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:32,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:36:32,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:32,034 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:34,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:34,361 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:34,361 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:36:34,362 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:36:34,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:34,362 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 [2019-01-08 14:36:34,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:36:34,370 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:36:34,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:36:34,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:36:34,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:34,455 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 [2019-01-08 14:36:34,455 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,465 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,465 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:36:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:37,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:41,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:41,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2019-01-08 14:36:41,748 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:41,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-01-08 14:36:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-01-08 14:36:41,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-08 14:36:41,751 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 142 states. [2019-01-08 14:36:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:42,290 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2019-01-08 14:36:42,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-01-08 14:36:42,290 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 210 [2019-01-08 14:36:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:42,292 INFO L225 Difference]: With dead ends: 216 [2019-01-08 14:36:42,292 INFO L226 Difference]: Without dead ends: 215 [2019-01-08 14:36:42,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 278 SyntacticMatches, 40 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19840 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-08 14:36:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-01-08 14:36:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-01-08 14:36:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-01-08 14:36:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2019-01-08 14:36:42,298 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 210 [2019-01-08 14:36:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:42,299 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2019-01-08 14:36:42,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2019-01-08 14:36:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2019-01-08 14:36:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-01-08 14:36:42,300 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:42,300 INFO L402 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1] [2019-01-08 14:36:42,300 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:42,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1380163232, now seen corresponding path program 70 times [2019-01-08 14:36:42,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:42,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:42,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:36:42,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:42,302 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:44,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:44,628 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:44,628 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:36:44,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:36:44,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:44,628 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 [2019-01-08 14:36:44,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:44,637 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:44,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:44,710 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 [2019-01-08 14:36:44,710 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:44,725 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:44,725 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:36:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:47,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:51,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:51,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 171 [2019-01-08 14:36:51,926 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:51,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2019-01-08 14:36:51,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2019-01-08 14:36:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-08 14:36:51,929 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 144 states. [2019-01-08 14:36:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:52,412 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2019-01-08 14:36:52,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-01-08 14:36:52,413 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 213 [2019-01-08 14:36:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:52,414 INFO L225 Difference]: With dead ends: 219 [2019-01-08 14:36:52,414 INFO L226 Difference]: Without dead ends: 218 [2019-01-08 14:36:52,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 282 SyntacticMatches, 42 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20337 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-08 14:36:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-01-08 14:36:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-01-08 14:36:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-01-08 14:36:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2019-01-08 14:36:52,420 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 213 [2019-01-08 14:36:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:52,420 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2019-01-08 14:36:52,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2019-01-08 14:36:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2019-01-08 14:36:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-01-08 14:36:52,422 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:52,422 INFO L402 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1] [2019-01-08 14:36:52,422 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash 720961420, now seen corresponding path program 71 times [2019-01-08 14:36:52,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:52,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:52,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:52,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:52,423 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:54,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:54,843 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:54,843 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:36:54,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:36:54,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:54,843 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 [2019-01-08 14:36:54,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:36:54,852 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:36:55,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2019-01-08 14:36:55,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:36:55,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:55,184 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 [2019-01-08 14:36:55,185 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:55,195 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:55,195 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:36:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:58,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:02,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:02,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 172 [2019-01-08 14:37:02,607 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:02,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-01-08 14:37:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-01-08 14:37:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-01-08 14:37:02,610 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 146 states. [2019-01-08 14:37:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:03,108 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2019-01-08 14:37:03,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-01-08 14:37:03,108 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 216 [2019-01-08 14:37:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:03,110 INFO L225 Difference]: With dead ends: 222 [2019-01-08 14:37:03,110 INFO L226 Difference]: Without dead ends: 221 [2019-01-08 14:37:03,111 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 [2019-01-08 14:37:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-01-08 14:37:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2019-01-08 14:37:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-01-08 14:37:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2019-01-08 14:37:03,116 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 216 [2019-01-08 14:37:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:03,116 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2019-01-08 14:37:03,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2019-01-08 14:37:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2019-01-08 14:37:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-01-08 14:37:03,117 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:03,117 INFO L402 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1] [2019-01-08 14:37:03,117 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:03,118 INFO L82 PathProgramCache]: Analyzing trace with hash -969742560, now seen corresponding path program 72 times [2019-01-08 14:37:03,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:03,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:03,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:37:03,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:03,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:05,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:05,587 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:05,587 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:37:05,587 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:37:05,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:05,587 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 [2019-01-08 14:37:05,595 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:37:05,595 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:37:05,673 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:37:05,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:37:05,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:05,682 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 [2019-01-08 14:37:05,683 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:05,690 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:05,690 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:37:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:09,077 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:13,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:13,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 173 [2019-01-08 14:37:13,087 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:13,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-01-08 14:37:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-01-08 14:37:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-08 14:37:13,089 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 148 states. [2019-01-08 14:37:13,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:13,588 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2019-01-08 14:37:13,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-01-08 14:37:13,589 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 219 [2019-01-08 14:37:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:13,591 INFO L225 Difference]: With dead ends: 225 [2019-01-08 14:37:13,591 INFO L226 Difference]: Without dead ends: 224 [2019-01-08 14:37:13,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 290 SyntacticMatches, 46 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21331 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-08 14:37:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-01-08 14:37:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2019-01-08 14:37:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-01-08 14:37:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2019-01-08 14:37:13,596 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 219 [2019-01-08 14:37:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:13,596 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2019-01-08 14:37:13,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-01-08 14:37:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2019-01-08 14:37:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-01-08 14:37:13,597 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:13,597 INFO L402 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1] [2019-01-08 14:37:13,598 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:13,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1650530548, now seen corresponding path program 73 times [2019-01-08 14:37:13,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:13,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:13,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:37:13,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:13,599 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:16,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:16,136 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:16,136 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:37:16,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:37:16,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:16,137 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 [2019-01-08 14:37:16,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:16,146 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:16,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:16,222 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 [2019-01-08 14:37:16,222 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:16,230 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:16,231 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:37:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:19,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:23,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:23,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 174 [2019-01-08 14:37:23,858 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:23,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2019-01-08 14:37:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2019-01-08 14:37:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-08 14:37:23,861 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 150 states. [2019-01-08 14:37:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:24,408 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2019-01-08 14:37:24,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-01-08 14:37:24,409 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 222 [2019-01-08 14:37:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:24,410 INFO L225 Difference]: With dead ends: 228 [2019-01-08 14:37:24,410 INFO L226 Difference]: Without dead ends: 227 [2019-01-08 14:37:24,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 294 SyntacticMatches, 48 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21828 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-08 14:37:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-01-08 14:37:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2019-01-08 14:37:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-01-08 14:37:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2019-01-08 14:37:24,417 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 222 [2019-01-08 14:37:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:24,417 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2019-01-08 14:37:24,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2019-01-08 14:37:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2019-01-08 14:37:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-01-08 14:37:24,418 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:24,419 INFO L402 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1] [2019-01-08 14:37:24,419 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2125057952, now seen corresponding path program 74 times [2019-01-08 14:37:24,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:24,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:24,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:24,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:24,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:27,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:27,022 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:27,022 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:37:27,023 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:37:27,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:27,023 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 [2019-01-08 14:37:27,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:37:27,030 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:37:27,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2019-01-08 14:37:27,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:37:27,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:27,363 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 [2019-01-08 14:37:27,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,372 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,372 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:37:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:30,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:34,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:34,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 175 [2019-01-08 14:37:34,768 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:34,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2019-01-08 14:37:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2019-01-08 14:37:34,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-08 14:37:34,770 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 152 states. [2019-01-08 14:37:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:35,376 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2019-01-08 14:37:35,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-01-08 14:37:35,376 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 225 [2019-01-08 14:37:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:35,378 INFO L225 Difference]: With dead ends: 231 [2019-01-08 14:37:35,378 INFO L226 Difference]: Without dead ends: 230 [2019-01-08 14:37:35,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 298 SyntacticMatches, 50 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-08 14:37:35,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-08 14:37:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2019-01-08 14:37:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-01-08 14:37:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2019-01-08 14:37:35,386 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 225 [2019-01-08 14:37:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:35,386 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2019-01-08 14:37:35,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2019-01-08 14:37:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2019-01-08 14:37:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-01-08 14:37:35,388 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:35,388 INFO L402 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1] [2019-01-08 14:37:35,388 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash -216453492, now seen corresponding path program 75 times [2019-01-08 14:37:35,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:35,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:35,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:37:35,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:35,389 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:38,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:38,385 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:38,386 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:37:38,386 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:37:38,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:38,386 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 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 [2019-01-08 14:37:38,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:37:38,394 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:37:38,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:37:38,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:37:38,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:38,489 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 [2019-01-08 14:37:38,489 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:38,500 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:38,500 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:37:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:41,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:46,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:46,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 176 [2019-01-08 14:37:46,037 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:46,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-01-08 14:37:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-01-08 14:37:46,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-08 14:37:46,040 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 154 states. [2019-01-08 14:37:46,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:46,699 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2019-01-08 14:37:46,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-01-08 14:37:46,699 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 228 [2019-01-08 14:37:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:46,701 INFO L225 Difference]: With dead ends: 234 [2019-01-08 14:37:46,701 INFO L226 Difference]: Without dead ends: 233 [2019-01-08 14:37:46,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 302 SyntacticMatches, 52 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22822 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-08 14:37:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-01-08 14:37:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2019-01-08 14:37:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-01-08 14:37:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2019-01-08 14:37:46,708 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 228 [2019-01-08 14:37:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:46,708 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2019-01-08 14:37:46,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-01-08 14:37:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2019-01-08 14:37:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-01-08 14:37:46,709 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:46,710 INFO L402 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1] [2019-01-08 14:37:46,710 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1620027360, now seen corresponding path program 76 times [2019-01-08 14:37:46,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:46,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:46,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:37:46,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:46,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:49,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:49,646 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:49,646 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:37:49,646 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:37:49,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:49,646 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 [2019-01-08 14:37:49,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:49,655 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:49,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:49,732 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 [2019-01-08 14:37:49,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:49,741 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:49,741 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:37:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:53,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:57,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:57,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 177 [2019-01-08 14:37:57,412 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:57,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2019-01-08 14:37:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2019-01-08 14:37:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-08 14:37:57,414 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 156 states. [2019-01-08 14:37:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:58,054 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2019-01-08 14:37:58,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-01-08 14:37:58,055 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 231 [2019-01-08 14:37:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:58,057 INFO L225 Difference]: With dead ends: 237 [2019-01-08 14:37:58,057 INFO L226 Difference]: Without dead ends: 236 [2019-01-08 14:37:58,058 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 306 SyntacticMatches, 54 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23319 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-08 14:37:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-01-08 14:37:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2019-01-08 14:37:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-01-08 14:37:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2019-01-08 14:37:58,063 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 231 [2019-01-08 14:37:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:58,063 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2019-01-08 14:37:58,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2019-01-08 14:37:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2019-01-08 14:37:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-01-08 14:37:58,064 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:58,064 INFO L402 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1] [2019-01-08 14:37:58,064 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:58,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash 312464908, now seen corresponding path program 77 times [2019-01-08 14:37:58,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:58,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:58,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:58,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:58,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:00,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:00,895 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:00,895 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:00,895 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:00,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:00,895 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 [2019-01-08 14:38:00,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:38:00,903 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:38:01,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2019-01-08 14:38:01,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:38:01,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:01,307 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 [2019-01-08 14:38:01,307 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,319 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,319 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:38:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:05,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:09,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:09,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 178 [2019-01-08 14:38:09,397 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:09,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2019-01-08 14:38:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2019-01-08 14:38:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-08 14:38:09,400 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 158 states. [2019-01-08 14:38:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:10,069 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2019-01-08 14:38:10,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-01-08 14:38:10,070 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 234 [2019-01-08 14:38:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:10,071 INFO L225 Difference]: With dead ends: 240 [2019-01-08 14:38:10,071 INFO L226 Difference]: Without dead ends: 239 [2019-01-08 14:38:10,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 310 SyntacticMatches, 56 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23816 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-08 14:38:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-01-08 14:38:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2019-01-08 14:38:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-01-08 14:38:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2019-01-08 14:38:10,076 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 234 [2019-01-08 14:38:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:10,077 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2019-01-08 14:38:10,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2019-01-08 14:38:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2019-01-08 14:38:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-01-08 14:38:10,078 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:10,078 INFO L402 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1] [2019-01-08 14:38:10,078 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1447985312, now seen corresponding path program 78 times [2019-01-08 14:38:10,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:10,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:10,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:38:10,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:10,079 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:12,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:12,975 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:12,975 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:12,975 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:12,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:12,975 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 [2019-01-08 14:38:12,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:38:12,983 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:38:13,069 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:38:13,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:38:13,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:13,079 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 [2019-01-08 14:38:13,080 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:13,102 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:13,103 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:38:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:16,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:21,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:21,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 179 [2019-01-08 14:38:21,106 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:21,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2019-01-08 14:38:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2019-01-08 14:38:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-08 14:38:21,109 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 160 states. [2019-01-08 14:38:21,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:21,741 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2019-01-08 14:38:21,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-01-08 14:38:21,742 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 237 [2019-01-08 14:38:21,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:21,743 INFO L225 Difference]: With dead ends: 243 [2019-01-08 14:38:21,744 INFO L226 Difference]: Without dead ends: 242 [2019-01-08 14:38:21,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 314 SyntacticMatches, 58 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24313 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-08 14:38:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-01-08 14:38:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2019-01-08 14:38:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-01-08 14:38:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2019-01-08 14:38:21,751 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 237 [2019-01-08 14:38:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:21,751 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2019-01-08 14:38:21,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2019-01-08 14:38:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2019-01-08 14:38:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-01-08 14:38:21,753 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:21,753 INFO L402 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1] [2019-01-08 14:38:21,753 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1721049716, now seen corresponding path program 79 times [2019-01-08 14:38:21,753 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:21,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:21,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:38:21,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:21,754 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:25,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:25,201 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:25,201 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:25,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:25,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:25,202 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 [2019-01-08 14:38:25,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:25,210 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:25,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:25,290 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 [2019-01-08 14:38:25,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,298 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,298 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:38:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:29,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:33,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:33,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 180 [2019-01-08 14:38:33,369 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:33,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2019-01-08 14:38:33,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2019-01-08 14:38:33,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-08 14:38:33,372 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 162 states. [2019-01-08 14:38:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:34,107 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2019-01-08 14:38:34,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-01-08 14:38:34,107 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 240 [2019-01-08 14:38:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:34,109 INFO L225 Difference]: With dead ends: 246 [2019-01-08 14:38:34,109 INFO L226 Difference]: Without dead ends: 245 [2019-01-08 14:38:34,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 318 SyntacticMatches, 60 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24810 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-08 14:38:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-01-08 14:38:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2019-01-08 14:38:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-01-08 14:38:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2019-01-08 14:38:34,116 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 240 [2019-01-08 14:38:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:34,116 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2019-01-08 14:38:34,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2019-01-08 14:38:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2019-01-08 14:38:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-01-08 14:38:34,117 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:34,117 INFO L402 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1] [2019-01-08 14:38:34,117 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1527531808, now seen corresponding path program 80 times [2019-01-08 14:38:34,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:34,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:34,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:34,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:34,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:37,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:37,155 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:37,155 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:37,155 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:37,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:37,156 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 [2019-01-08 14:38:37,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:38:37,164 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:38:37,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-01-08 14:38:37,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:38:37,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:37,623 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 [2019-01-08 14:38:37,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:37,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:37,635 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:38:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:41,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:45,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:45,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 181 [2019-01-08 14:38:45,932 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:45,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2019-01-08 14:38:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2019-01-08 14:38:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-01-08 14:38:45,934 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 164 states. [2019-01-08 14:38:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:46,539 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2019-01-08 14:38:46,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-01-08 14:38:46,540 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 243 [2019-01-08 14:38:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:46,541 INFO L225 Difference]: With dead ends: 249 [2019-01-08 14:38:46,541 INFO L226 Difference]: Without dead ends: 248 [2019-01-08 14:38:46,542 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 [2019-01-08 14:38:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-01-08 14:38:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2019-01-08 14:38:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2019-01-08 14:38:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2019-01-08 14:38:46,546 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 243 [2019-01-08 14:38:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:46,547 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2019-01-08 14:38:46,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2019-01-08 14:38:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2019-01-08 14:38:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-01-08 14:38:46,547 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:46,548 INFO L402 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1] [2019-01-08 14:38:46,548 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1521632524, now seen corresponding path program 81 times [2019-01-08 14:38:46,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:46,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:46,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:38:46,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:46,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:49,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:49,911 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:49,911 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:49,911 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:49,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:49,911 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 [2019-01-08 14:38:49,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:38:49,921 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:38:50,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:38:50,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:38:50,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:50,019 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 [2019-01-08 14:38:50,019 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:38:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:53,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:58,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:58,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 182 [2019-01-08 14:38:58,217 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:58,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2019-01-08 14:38:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2019-01-08 14:38:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-08 14:38:58,220 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 166 states. [2019-01-08 14:38:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:58,833 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2019-01-08 14:38:58,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-01-08 14:38:58,834 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 246 [2019-01-08 14:38:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:58,835 INFO L225 Difference]: With dead ends: 252 [2019-01-08 14:38:58,835 INFO L226 Difference]: Without dead ends: 251 [2019-01-08 14:38:58,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 326 SyntacticMatches, 64 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25804 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-08 14:38:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-01-08 14:38:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2019-01-08 14:38:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-01-08 14:38:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2019-01-08 14:38:58,840 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 246 [2019-01-08 14:38:58,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:58,840 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2019-01-08 14:38:58,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2019-01-08 14:38:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2019-01-08 14:38:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-01-08 14:38:58,841 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:58,841 INFO L402 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1] [2019-01-08 14:38:58,841 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:58,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1869722016, now seen corresponding path program 82 times [2019-01-08 14:38:58,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:58,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:58,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:38:58,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:58,843 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:02,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:02,305 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:02,305 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:02,305 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:02,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:02,305 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 [2019-01-08 14:39:02,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:02,316 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:02,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:02,401 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 [2019-01-08 14:39:02,401 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,408 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,409 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:39:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:06,545 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:10,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:10,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 183 [2019-01-08 14:39:10,997 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:10,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2019-01-08 14:39:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2019-01-08 14:39:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-08 14:39:10,999 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 168 states. [2019-01-08 14:39:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:11,642 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2019-01-08 14:39:11,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-01-08 14:39:11,643 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 249 [2019-01-08 14:39:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:11,644 INFO L225 Difference]: With dead ends: 255 [2019-01-08 14:39:11,644 INFO L226 Difference]: Without dead ends: 254 [2019-01-08 14:39:11,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 330 SyntacticMatches, 66 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26301 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-08 14:39:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-01-08 14:39:11,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2019-01-08 14:39:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2019-01-08 14:39:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2019-01-08 14:39:11,650 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 249 [2019-01-08 14:39:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:11,650 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2019-01-08 14:39:11,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2019-01-08 14:39:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2019-01-08 14:39:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-01-08 14:39:11,652 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:11,652 INFO L402 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1] [2019-01-08 14:39:11,652 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash -542241652, now seen corresponding path program 83 times [2019-01-08 14:39:11,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:11,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:11,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:11,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:11,654 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:15,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:15,258 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:15,258 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:15,258 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:15,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:15,258 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 [2019-01-08 14:39:15,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:39:15,267 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:39:15,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-01-08 14:39:15,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:39:15,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:15,759 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 [2019-01-08 14:39:15,759 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,767 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,767 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:39:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:19,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:24,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:24,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 184 [2019-01-08 14:39:24,089 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:24,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2019-01-08 14:39:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2019-01-08 14:39:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-08 14:39:24,092 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 170 states. [2019-01-08 14:39:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:24,734 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2019-01-08 14:39:24,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-01-08 14:39:24,735 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 252 [2019-01-08 14:39:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:24,737 INFO L225 Difference]: With dead ends: 258 [2019-01-08 14:39:24,737 INFO L226 Difference]: Without dead ends: 257 [2019-01-08 14:39:24,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 334 SyntacticMatches, 68 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26798 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-08 14:39:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-01-08 14:39:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2019-01-08 14:39:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-01-08 14:39:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2019-01-08 14:39:24,742 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 252 [2019-01-08 14:39:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:24,743 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2019-01-08 14:39:24,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2019-01-08 14:39:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2019-01-08 14:39:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-01-08 14:39:24,744 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:24,744 INFO L402 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1] [2019-01-08 14:39:24,744 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash -549012960, now seen corresponding path program 84 times [2019-01-08 14:39:24,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:24,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:39:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:24,745 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:28,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:28,167 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:28,167 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:28,167 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:28,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:28,167 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 [2019-01-08 14:39:28,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:39:28,176 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:39:28,266 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:39:28,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:39:28,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:28,278 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 [2019-01-08 14:39:28,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,292 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,293 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:39:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:32,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:36,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:36,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 185 [2019-01-08 14:39:36,891 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:36,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2019-01-08 14:39:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2019-01-08 14:39:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-08 14:39:36,894 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 172 states. [2019-01-08 14:39:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:37,602 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2019-01-08 14:39:37,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-01-08 14:39:37,603 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 255 [2019-01-08 14:39:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:37,605 INFO L225 Difference]: With dead ends: 261 [2019-01-08 14:39:37,605 INFO L226 Difference]: Without dead ends: 260 [2019-01-08 14:39:37,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 338 SyntacticMatches, 70 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27295 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-08 14:39:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-01-08 14:39:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2019-01-08 14:39:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-01-08 14:39:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2019-01-08 14:39:37,612 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 255 [2019-01-08 14:39:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:37,612 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2019-01-08 14:39:37,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2019-01-08 14:39:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2019-01-08 14:39:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-01-08 14:39:37,613 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:37,614 INFO L402 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1] [2019-01-08 14:39:37,614 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash -409586676, now seen corresponding path program 85 times [2019-01-08 14:39:37,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:37,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:37,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:39:37,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:37,615 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:41,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:41,521 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:41,522 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:41,522 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:41,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:41,522 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 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 [2019-01-08 14:39:41,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:41,532 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:41,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:41,623 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 [2019-01-08 14:39:41,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:41,634 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:41,634 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:39:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:45,943 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:50,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:50,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 186 [2019-01-08 14:39:50,124 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:50,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2019-01-08 14:39:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2019-01-08 14:39:50,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-08 14:39:50,127 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 174 states. [2019-01-08 14:39:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:50,935 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2019-01-08 14:39:50,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-01-08 14:39:50,936 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 258 [2019-01-08 14:39:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:50,937 INFO L225 Difference]: With dead ends: 264 [2019-01-08 14:39:50,937 INFO L226 Difference]: Without dead ends: 263 [2019-01-08 14:39:50,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 342 SyntacticMatches, 72 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27792 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-08 14:39:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-01-08 14:39:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2019-01-08 14:39:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2019-01-08 14:39:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2019-01-08 14:39:50,945 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 258 [2019-01-08 14:39:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:50,946 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2019-01-08 14:39:50,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2019-01-08 14:39:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2019-01-08 14:39:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-01-08 14:39:50,947 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:50,947 INFO L402 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1] [2019-01-08 14:39:50,948 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:50,948 INFO L82 PathProgramCache]: Analyzing trace with hash 5464736, now seen corresponding path program 86 times [2019-01-08 14:39:50,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:50,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:50,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:50,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:50,949 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:54,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:54,454 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:54,455 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:54,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:54,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:54,455 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 [2019-01-08 14:39:54,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:39:54,464 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:39:54,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2019-01-08 14:39:54,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:39:54,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:54,992 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 [2019-01-08 14:39:54,992 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:55,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:55,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:39:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:59,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:03,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:03,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 187 [2019-01-08 14:40:03,812 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:03,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2019-01-08 14:40:03,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2019-01-08 14:40:03,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-08 14:40:03,815 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 176 states. [2019-01-08 14:40:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:04,556 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2019-01-08 14:40:04,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-01-08 14:40:04,556 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 261 [2019-01-08 14:40:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:04,557 INFO L225 Difference]: With dead ends: 267 [2019-01-08 14:40:04,557 INFO L226 Difference]: Without dead ends: 266 [2019-01-08 14:40:04,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 346 SyntacticMatches, 74 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28289 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-08 14:40:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-01-08 14:40:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2019-01-08 14:40:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2019-01-08 14:40:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2019-01-08 14:40:04,563 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 261 [2019-01-08 14:40:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:04,563 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2019-01-08 14:40:04,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2019-01-08 14:40:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2019-01-08 14:40:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-01-08 14:40:04,564 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:04,565 INFO L402 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1] [2019-01-08 14:40:04,565 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash -408765556, now seen corresponding path program 87 times [2019-01-08 14:40:04,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:04,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:04,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:40:04,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:04,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:08,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:08,253 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:08,253 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:40:08,253 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:40:08,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:08,253 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 [2019-01-08 14:40:08,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:40:08,265 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:40:08,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:40:08,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:40:08,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:08,378 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 [2019-01-08 14:40:08,378 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:08,386 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:08,386 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:40:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:12,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:17,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:17,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 188 [2019-01-08 14:40:17,267 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:17,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2019-01-08 14:40:17,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2019-01-08 14:40:17,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-08 14:40:17,270 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 178 states. [2019-01-08 14:40:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:17,936 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2019-01-08 14:40:17,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-01-08 14:40:17,937 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 264 [2019-01-08 14:40:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:17,938 INFO L225 Difference]: With dead ends: 270 [2019-01-08 14:40:17,938 INFO L226 Difference]: Without dead ends: 269 [2019-01-08 14:40:17,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 350 SyntacticMatches, 76 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28786 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-08 14:40:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-01-08 14:40:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2019-01-08 14:40:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-01-08 14:40:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2019-01-08 14:40:17,943 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 264 [2019-01-08 14:40:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:17,944 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2019-01-08 14:40:17,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2019-01-08 14:40:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2019-01-08 14:40:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-01-08 14:40:17,945 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:17,945 INFO L402 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1] [2019-01-08 14:40:17,945 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353120, now seen corresponding path program 88 times [2019-01-08 14:40:17,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:17,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:17,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:40:17,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:17,946 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:21,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:21,751 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:21,751 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:40:21,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:40:21,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:21,752 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 [2019-01-08 14:40:21,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:21,762 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:21,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:21,853 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 [2019-01-08 14:40:21,853 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:21,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:21,861 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:40:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:26,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:30,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:30,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 189 [2019-01-08 14:40:30,635 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:30,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2019-01-08 14:40:30,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2019-01-08 14:40:30,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-08 14:40:30,638 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 180 states. [2019-01-08 14:40:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:31,542 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2019-01-08 14:40:31,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-01-08 14:40:31,543 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 267 [2019-01-08 14:40:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:31,544 INFO L225 Difference]: With dead ends: 273 [2019-01-08 14:40:31,544 INFO L226 Difference]: Without dead ends: 272 [2019-01-08 14:40:31,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 354 SyntacticMatches, 78 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29283 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-08 14:40:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-01-08 14:40:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2019-01-08 14:40:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2019-01-08 14:40:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2019-01-08 14:40:31,550 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 267 [2019-01-08 14:40:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:31,550 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2019-01-08 14:40:31,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2019-01-08 14:40:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2019-01-08 14:40:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-01-08 14:40:31,551 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:31,551 INFO L402 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1] [2019-01-08 14:40:31,552 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:31,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:31,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1962171636, now seen corresponding path program 89 times [2019-01-08 14:40:31,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:31,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:31,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:31,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:31,553 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:35,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:35,293 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:35,293 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:40:35,293 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:40:35,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:35,293 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 [2019-01-08 14:40:35,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:40:35,303 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:40:35,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2019-01-08 14:40:35,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:40:35,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:35,864 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 [2019-01-08 14:40:35,864 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:35,876 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:35,876 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:40:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:40,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:44,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:44,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 190 [2019-01-08 14:40:44,820 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:44,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2019-01-08 14:40:44,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2019-01-08 14:40:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-08 14:40:44,823 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 182 states. [2019-01-08 14:40:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:45,620 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2019-01-08 14:40:45,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-01-08 14:40:45,620 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 270 [2019-01-08 14:40:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:45,622 INFO L225 Difference]: With dead ends: 276 [2019-01-08 14:40:45,622 INFO L226 Difference]: Without dead ends: 275 [2019-01-08 14:40:45,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 358 SyntacticMatches, 80 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29780 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-08 14:40:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-01-08 14:40:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2019-01-08 14:40:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-01-08 14:40:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 274 transitions. [2019-01-08 14:40:45,628 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 274 transitions. Word has length 270 [2019-01-08 14:40:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:45,628 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 274 transitions. [2019-01-08 14:40:45,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2019-01-08 14:40:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 274 transitions. [2019-01-08 14:40:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-01-08 14:40:45,629 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:45,629 INFO L402 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1] [2019-01-08 14:40:45,630 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash -550268000, now seen corresponding path program 90 times [2019-01-08 14:40:45,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:45,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:40:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:45,631 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:49,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:49,448 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:49,448 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:40:49,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:40:49,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:49,449 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 [2019-01-08 14:40:49,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:40:49,460 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:40:49,560 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:40:49,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:40:49,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:49,574 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 [2019-01-08 14:40:49,574 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:49,584 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:49,584 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:40:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:54,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:58,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:58,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 191 [2019-01-08 14:40:58,432 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:58,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2019-01-08 14:40:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2019-01-08 14:40:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-08 14:40:58,435 INFO L87 Difference]: Start difference. First operand 274 states and 274 transitions. Second operand 184 states. [2019-01-08 14:40:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:59,214 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2019-01-08 14:40:59,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-01-08 14:40:59,215 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 273 [2019-01-08 14:40:59,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:59,216 INFO L225 Difference]: With dead ends: 279 [2019-01-08 14:40:59,216 INFO L226 Difference]: Without dead ends: 278 [2019-01-08 14:40:59,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 362 SyntacticMatches, 82 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30277 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-08 14:40:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-01-08 14:40:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2019-01-08 14:40:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-01-08 14:40:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2019-01-08 14:40:59,222 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 273 [2019-01-08 14:40:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:59,222 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2019-01-08 14:40:59,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2019-01-08 14:40:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2019-01-08 14:40:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-01-08 14:40:59,223 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:59,223 INFO L402 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1] [2019-01-08 14:40:59,223 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash 856222348, now seen corresponding path program 91 times [2019-01-08 14:40:59,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:59,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:59,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:40:59,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:59,224 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:03,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:03,058 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:03,059 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:41:03,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:41:03,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:03,059 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 [2019-01-08 14:41:03,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:03,068 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:03,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:03,161 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 [2019-01-08 14:41:03,161 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:03,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:03,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:41:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:07,909 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:12,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:12,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 192 [2019-01-08 14:41:12,056 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:12,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2019-01-08 14:41:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2019-01-08 14:41:12,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-08 14:41:12,059 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 186 states. [2019-01-08 14:41:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:12,772 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2019-01-08 14:41:12,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-01-08 14:41:12,772 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 276 [2019-01-08 14:41:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:12,774 INFO L225 Difference]: With dead ends: 282 [2019-01-08 14:41:12,774 INFO L226 Difference]: Without dead ends: 281 [2019-01-08 14:41:12,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 366 SyntacticMatches, 84 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30774 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-08 14:41:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-01-08 14:41:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2019-01-08 14:41:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-01-08 14:41:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2019-01-08 14:41:12,780 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 276 [2019-01-08 14:41:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:12,780 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2019-01-08 14:41:12,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2019-01-08 14:41:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2019-01-08 14:41:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-01-08 14:41:12,781 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:12,781 INFO L402 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1] [2019-01-08 14:41:12,781 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash -90760160, now seen corresponding path program 92 times [2019-01-08 14:41:12,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:12,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:12,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:12,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:12,782 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:16,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:16,827 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:16,827 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:41:16,827 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:41:16,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:16,828 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 [2019-01-08 14:41:16,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:41:16,836 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:41:17,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2019-01-08 14:41:17,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:41:17,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:17,386 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 [2019-01-08 14:41:17,387 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:17,397 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:17,397 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:41:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:22,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:26,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:26,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 193 [2019-01-08 14:41:26,196 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:26,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2019-01-08 14:41:26,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2019-01-08 14:41:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-08 14:41:26,199 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 188 states. [2019-01-08 14:41:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:26,943 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2019-01-08 14:41:26,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-01-08 14:41:26,944 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 279 [2019-01-08 14:41:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:26,945 INFO L225 Difference]: With dead ends: 285 [2019-01-08 14:41:26,945 INFO L226 Difference]: Without dead ends: 284 [2019-01-08 14:41:26,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 370 SyntacticMatches, 86 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31271 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-08 14:41:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-01-08 14:41:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2019-01-08 14:41:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2019-01-08 14:41:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2019-01-08 14:41:26,951 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 279 [2019-01-08 14:41:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:26,952 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2019-01-08 14:41:26,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2019-01-08 14:41:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2019-01-08 14:41:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-01-08 14:41:26,953 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:26,953 INFO L402 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1] [2019-01-08 14:41:26,953 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1993511436, now seen corresponding path program 93 times [2019-01-08 14:41:26,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:26,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:26,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:41:26,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:26,954 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:30,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:30,874 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:30,874 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:41:30,874 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:41:30,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:30,875 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 [2019-01-08 14:41:30,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:41:30,890 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:41:30,986 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:41:30,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:41:30,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:31,010 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 [2019-01-08 14:41:31,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:31,033 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:31,033 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:41:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:35,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:39,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:39,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 194 [2019-01-08 14:41:39,879 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:39,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2019-01-08 14:41:39,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2019-01-08 14:41:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-08 14:41:39,882 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 190 states. [2019-01-08 14:41:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:40,665 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2019-01-08 14:41:40,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-01-08 14:41:40,665 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 282 [2019-01-08 14:41:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:40,667 INFO L225 Difference]: With dead ends: 288 [2019-01-08 14:41:40,667 INFO L226 Difference]: Without dead ends: 287 [2019-01-08 14:41:40,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 374 SyntacticMatches, 88 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31768 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-08 14:41:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-01-08 14:41:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2019-01-08 14:41:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2019-01-08 14:41:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2019-01-08 14:41:40,673 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 282 [2019-01-08 14:41:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:40,673 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2019-01-08 14:41:40,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2019-01-08 14:41:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2019-01-08 14:41:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-01-08 14:41:40,674 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:40,674 INFO L402 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1] [2019-01-08 14:41:40,674 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2108537696, now seen corresponding path program 94 times [2019-01-08 14:41:40,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:40,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:40,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:41:40,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:40,675 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:44,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:44,655 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:44,655 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:41:44,655 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:41:44,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:44,655 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 [2019-01-08 14:41:44,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:44,664 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:44,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:44,754 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 [2019-01-08 14:41:44,754 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:44,762 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:44,762 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:41:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:49,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:53,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:53,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 195 [2019-01-08 14:41:53,717 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:53,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-01-08 14:41:53,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-01-08 14:41:53,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-08 14:41:53,720 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 192 states. [2019-01-08 14:41:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:54,371 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2019-01-08 14:41:54,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-01-08 14:41:54,372 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 285 [2019-01-08 14:41:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:54,373 INFO L225 Difference]: With dead ends: 291 [2019-01-08 14:41:54,373 INFO L226 Difference]: Without dead ends: 290 [2019-01-08 14:41:54,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 378 SyntacticMatches, 90 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32265 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-08 14:41:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-01-08 14:41:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2019-01-08 14:41:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2019-01-08 14:41:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2019-01-08 14:41:54,379 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 285 [2019-01-08 14:41:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:54,380 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2019-01-08 14:41:54,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-01-08 14:41:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2019-01-08 14:41:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-01-08 14:41:54,381 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:54,381 INFO L402 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1] [2019-01-08 14:41:54,382 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1549756020, now seen corresponding path program 95 times [2019-01-08 14:41:54,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:54,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:54,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:54,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:54,383 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:58,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:58,500 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:58,500 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:41:58,501 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:41:58,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:58,501 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 [2019-01-08 14:41:58,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:41:58,511 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:41:59,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2019-01-08 14:41:59,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:41:59,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:59,101 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 [2019-01-08 14:41:59,102 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:59,112 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:59,112 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:42:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:03,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:08,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:08,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 196 [2019-01-08 14:42:08,197 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:08,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-01-08 14:42:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-01-08 14:42:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-08 14:42:08,200 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 194 states. [2019-01-08 14:42:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:09,025 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2019-01-08 14:42:09,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-01-08 14:42:09,025 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 288 [2019-01-08 14:42:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:09,027 INFO L225 Difference]: With dead ends: 294 [2019-01-08 14:42:09,027 INFO L226 Difference]: Without dead ends: 293 [2019-01-08 14:42:09,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 382 SyntacticMatches, 92 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32762 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-08 14:42:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-01-08 14:42:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2019-01-08 14:42:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2019-01-08 14:42:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2019-01-08 14:42:09,033 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 288 [2019-01-08 14:42:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:09,034 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2019-01-08 14:42:09,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-01-08 14:42:09,034 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2019-01-08 14:42:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2019-01-08 14:42:09,035 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:09,036 INFO L402 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1] [2019-01-08 14:42:09,036 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:09,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:09,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2116881696, now seen corresponding path program 96 times [2019-01-08 14:42:09,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:09,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:09,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:42:09,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:09,037 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:13,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:13,157 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:13,157 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:42:13,157 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:42:13,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:13,158 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 [2019-01-08 14:42:13,166 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:42:13,166 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:42:13,267 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:42:13,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:42:13,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:13,280 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 [2019-01-08 14:42:13,280 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,291 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,291 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:42:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:18,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:22,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:22,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 197 [2019-01-08 14:42:22,524 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:22,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-01-08 14:42:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-01-08 14:42:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-08 14:42:22,527 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 196 states. [2019-01-08 14:42:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:23,185 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2019-01-08 14:42:23,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-01-08 14:42:23,186 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 291 [2019-01-08 14:42:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:23,187 INFO L225 Difference]: With dead ends: 297 [2019-01-08 14:42:23,188 INFO L226 Difference]: Without dead ends: 296 [2019-01-08 14:42:23,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 386 SyntacticMatches, 94 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33259 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-08 14:42:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-01-08 14:42:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2019-01-08 14:42:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-01-08 14:42:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2019-01-08 14:42:23,194 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 291 [2019-01-08 14:42:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:23,194 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2019-01-08 14:42:23,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-01-08 14:42:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2019-01-08 14:42:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-01-08 14:42:23,196 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:23,196 INFO L402 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1] [2019-01-08 14:42:23,196 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1017839884, now seen corresponding path program 97 times [2019-01-08 14:42:23,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:23,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:23,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:42:23,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:23,197 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:27,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:27,430 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:27,430 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:42:27,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:42:27,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:27,431 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 [2019-01-08 14:42:27,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:27,438 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:27,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:27,532 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 [2019-01-08 14:42:27,532 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:27,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:27,541 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:42:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:32,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:36,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:36,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 198 [2019-01-08 14:42:36,831 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:36,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-01-08 14:42:36,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-01-08 14:42:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-08 14:42:36,834 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 198 states. [2019-01-08 14:42:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:37,594 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2019-01-08 14:42:37,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-01-08 14:42:37,594 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 294 [2019-01-08 14:42:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:37,596 INFO L225 Difference]: With dead ends: 300 [2019-01-08 14:42:37,596 INFO L226 Difference]: Without dead ends: 299 [2019-01-08 14:42:37,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 390 SyntacticMatches, 96 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-08 14:42:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-01-08 14:42:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2019-01-08 14:42:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2019-01-08 14:42:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2019-01-08 14:42:37,602 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 294 [2019-01-08 14:42:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:37,602 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2019-01-08 14:42:37,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-01-08 14:42:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2019-01-08 14:42:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-01-08 14:42:37,603 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:37,604 INFO L402 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1] [2019-01-08 14:42:37,604 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1084000, now seen corresponding path program 98 times [2019-01-08 14:42:37,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:37,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:37,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:37,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:37,605 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:41,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:41,979 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:41,979 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:42:41,979 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:42:41,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:41,979 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 [2019-01-08 14:42:41,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:42:41,988 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:42:42,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 99 check-sat command(s) [2019-01-08 14:42:42,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:42:42,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:42,630 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 [2019-01-08 14:42:42,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:42,709 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:42,710 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:42:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:47,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:52,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:52,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 199 [2019-01-08 14:42:52,055 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:52,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-01-08 14:42:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-01-08 14:42:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-08 14:42:52,058 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 200 states. [2019-01-08 14:42:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:52,876 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2019-01-08 14:42:52,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-01-08 14:42:52,883 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 297 [2019-01-08 14:42:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:52,884 INFO L225 Difference]: With dead ends: 303 [2019-01-08 14:42:52,884 INFO L226 Difference]: Without dead ends: 302 [2019-01-08 14:42:52,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 394 SyntacticMatches, 98 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34253 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-08 14:42:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-01-08 14:42:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2019-01-08 14:42:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-01-08 14:42:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2019-01-08 14:42:52,892 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 297 [2019-01-08 14:42:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:52,893 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2019-01-08 14:42:52,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-01-08 14:42:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2019-01-08 14:42:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2019-01-08 14:42:52,894 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:52,895 INFO L402 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1] [2019-01-08 14:42:52,895 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:52,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2066335884, now seen corresponding path program 99 times [2019-01-08 14:42:52,895 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:52,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:52,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:42:52,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:52,896 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:57,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:57,366 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:57,366 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:42:57,366 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:42:57,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:57,366 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 [2019-01-08 14:42:57,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-08 14:42:57,374 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-08 14:42:57,498 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-08 14:42:57,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:42:57,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:57,513 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 [2019-01-08 14:42:57,513 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:57,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:57,537 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-08 14:43:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:02,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:43:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:06,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:43:06,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 200 [2019-01-08 14:43:06,920 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:43:06,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-01-08 14:43:06,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-01-08 14:43:06,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-08 14:43:06,923 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 202 states. [2019-01-08 14:43:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:07,660 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2019-01-08 14:43:07,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-01-08 14:43:07,661 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 300 [2019-01-08 14:43:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:07,662 INFO L225 Difference]: With dead ends: 306 [2019-01-08 14:43:07,662 INFO L226 Difference]: Without dead ends: 305 [2019-01-08 14:43:07,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 399 SyntacticMatches, 99 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34551 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-08 14:43:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-01-08 14:43:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2019-01-08 14:43:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-01-08 14:43:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2019-01-08 14:43:07,669 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 300 [2019-01-08 14:43:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:07,669 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2019-01-08 14:43:07,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-01-08 14:43:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2019-01-08 14:43:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-01-08 14:43:07,671 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:43:07,671 INFO L402 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1] [2019-01-08 14:43:07,671 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:43:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:07,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1553891808, now seen corresponding path program 100 times [2019-01-08 14:43:07,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:43:07,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:07,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:43:07,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:07,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:43:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 14752 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:11,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:11,949 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:43:11,949 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:43:11,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:43:11,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:11,950 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 [2019-01-08 14:43:11,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:11,958 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:43:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:12,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:43:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:12,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:43:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:16,105 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-01-08 14:43:16,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102, 102] imperfect sequences [102] total 103 [2019-01-08 14:43:16,106 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:43:16,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-01-08 14:43:16,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-01-08 14:43:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2019-01-08 14:43:16,107 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 103 states. [2019-01-08 14:43:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:16,793 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2019-01-08 14:43:16,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-01-08 14:43:16,794 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 303 [2019-01-08 14:43:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:16,795 INFO L225 Difference]: With dead ends: 306 [2019-01-08 14:43:16,795 INFO L226 Difference]: Without dead ends: 0 [2019-01-08 14:43:16,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 504 SyntacticMatches, 100 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5544 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2019-01-08 14:43:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-08 14:43:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-08 14:43:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-08 14:43:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-08 14:43:16,798 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 303 [2019-01-08 14:43:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:16,798 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-08 14:43:16,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-01-08 14:43:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-08 14:43:16,799 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-08 14:43:16,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-08 14:43:16,924 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 511 [2019-01-08 14:43:19,907 WARN L181 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 511 DAG size of output: 509 [2019-01-08 14:43:19,916 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 2 23) no Hoare annotation was computed. [2019-01-08 14:43:19,916 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 2 23) no Hoare annotation was computed. [2019-01-08 14:43:19,916 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-01-08 14:43:19,916 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 15) no Hoare annotation was computed. [2019-01-08 14:43:19,916 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2019-01-08 14:43:19,918 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))) [2019-01-08 14:43:19,918 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 2 23) no Hoare annotation was computed. [2019-01-08 14:43:19,959 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.01 02:43:19 BoogieIcfgContainer [2019-01-08 14:43:19,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-08 14:43:19,959 INFO L168 Benchmark]: Toolchain (without parser) took 729721.66 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 551.0 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -122.1 MB). Peak memory consumption was 722.6 MB. Max. memory is 7.1 GB. [2019-01-08 14:43:19,960 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:43:19,960 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:43:19,960 INFO L168 Benchmark]: Boogie Preprocessor took 27.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:43:19,961 INFO L168 Benchmark]: RCFGBuilder took 366.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-08 14:43:19,961 INFO L168 Benchmark]: TraceAbstraction took 729263.42 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 551.0 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -143.2 MB). Peak memory consumption was 701.5 MB. Max. memory is 7.1 GB. [2019-01-08 14:43:19,963 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 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 60.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 366.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 729263.42 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 551.0 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -143.2 MB). Peak memory consumption was 701.5 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, 729.1s OverallTime, 101 OverallIterations, 101 TraceHistogramMax, 42.0s AutomataDifference, 0.0s DeadEndRemovalTime, 3.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 202 SDtfs, 7321 SDslu, 1 SDs, 0 SdLazy, 27597 SolverSat, 353 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35852 GetRequests, 20503 SyntacticMatches, 2649 SemanticMatches, 12700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303168 ImplicationChecksByTransitivity, 626.3s 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, 9.8s 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, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 13.3s SatisfiabilityAnalysisTime, 651.3s 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...