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-simplified02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-18 18:05:38,015 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 18:05:38,019 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 18:05:38,036 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-18 18:05:38,036 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-18 18:05:38,038 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-18 18:05:38,040 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-18 18:05:38,044 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-18 18:05:38,046 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-18 18:05:38,047 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-18 18:05:38,056 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-18 18:05:38,080 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 [2019-01-18 18:05:38,092 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 18:05:38,093 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 18:05:38,093 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 18:05:38,094 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 18:05:38,094 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 18:05:38,094 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 18:05:38,094 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 18:05:38,094 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 18:05:38,095 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 18:05:38,095 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-18 18:05:38,095 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-18 18:05:38,095 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 18:05:38,095 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 18:05:38,096 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 18:05:38,096 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 18:05:38,096 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 18:05:38,096 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 18:05:38,097 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 18:05:38,097 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 18:05:38,097 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 18:05:38,097 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 18:05:38,097 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 18:05:38,098 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 18:05:38,098 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 18:05:38,098 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 18:05:38,098 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 18:05:38,098 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 18:05:38,099 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 18:05:38,099 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 18:05:38,099 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 18:05:38,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 18:05:38,099 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 18:05:38,100 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 18:05:38,100 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 18:05:38,100 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 18:05:38,100 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 18:05:38,100 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 18:05:38,101 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 18:05:38,101 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 18:05:38,130 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 18:05:38,146 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 18:05:38,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 18:05:38,156 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 18:05:38,156 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 18:05:38,159 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified02.bpl [2019-01-18 18:05:38,159 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/PointerIncrement-simplified02.bpl' [2019-01-18 18:05:38,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 18:05:38,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 18:05:38,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 18:05:38,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 18:05:38,217 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 18:05:38,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,255 WARN L165 Inliner]: Program contained no entry procedure! [2019-01-18 18:05:38,255 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-01-18 18:05:38,255 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-01-18 18:05:38,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 18:05:38,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 18:05:38,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 18:05:38,276 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 18:05:38,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... [2019-01-18 18:05:38,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 18:05:38,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 18:05:38,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 18:05:38,298 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 18:05:38,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 18:05:38,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-18 18:05:38,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-18 18:05:38,361 INFO L130 BoogieDeclarations]: Found specification of procedure ~malloc [2019-01-18 18:05:38,665 INFO L278 CfgBuilder]: Using library mode [2019-01-18 18:05:38,666 INFO L286 CfgBuilder]: Removed 3 assue(true) statements. [2019-01-18 18:05:38,667 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:05:38 BoogieIcfgContainer [2019-01-18 18:05:38,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 18:05:38,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 18:05:38,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 18:05:38,675 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 18:05:38,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:05:38" (1/2) ... [2019-01-18 18:05:38,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222132cf and model type PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:05:38, skipping insertion in model container [2019-01-18 18:05:38,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:05:38" (2/2) ... [2019-01-18 18:05:38,685 INFO L112 eAbstractionObserver]: Analyzing ICFG PointerIncrement-simplified02.bpl [2019-01-18 18:05:38,701 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 18:05:38,723 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-18 18:05:38,756 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-18 18:05:38,795 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 18:05:38,795 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 18:05:38,795 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 18:05:38,795 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 18:05:38,796 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 18:05:38,796 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 18:05:38,796 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 18:05:38,796 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 18:05:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-01-18 18:05:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 18:05:38,823 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:05:38,824 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 18:05:38,827 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:05:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:05:38,832 INFO L82 PathProgramCache]: Analyzing trace with hash 927590, now seen corresponding path program 1 times [2019-01-18 18:05:38,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:05:38,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:05:38,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:05:38,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:05:38,878 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:05:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:05:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:05:39,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 18:05:39,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 18:05:39,040 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 18:05:39,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 18:05:39,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 18:05:39,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 18:05:39,057 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-01-18 18:05:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:05:39,121 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-01-18 18:05:39,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 18:05:39,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-01-18 18:05:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:05:39,136 INFO L225 Difference]: With dead ends: 17 [2019-01-18 18:05:39,137 INFO L226 Difference]: Without dead ends: 10 [2019-01-18 18:05:39,140 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 [2019-01-18 18:05:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-18 18:05:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-01-18 18:05:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-18 18:05:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-01-18 18:05:39,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 4 [2019-01-18 18:05:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:05:39,171 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-01-18 18:05:39,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 18:05:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-01-18 18:05:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-18 18:05:39,172 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:05:39,173 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-01-18 18:05:39,173 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:05:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:05:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1951667359, now seen corresponding path program 1 times [2019-01-18 18:05:39,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:05:39,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:05:39,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:05:39,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:05:39,176 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:05:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:05:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:05:39,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:05:39,270 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:05:39,271 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2019-01-18 18:05:39,273 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [8], [9], [13] [2019-01-18 18:05:39,340 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-18 18:05:39,340 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 18:06:00,453 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 18:06:00,455 INFO L272 AbstractInterpreter]: Visited 6 different actions 71 times. Merged at 5 different actions 65 times. Widened at 1 different actions 9 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 18:06:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:00,462 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 18:06:00,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:00,462 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 [2019-01-18 18:06:00,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:00,479 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:00,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:00,566 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 [2019-01-18 18:06:00,567 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:00,663 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:00,664 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:00,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:00,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:00,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 18:06:00,913 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:00,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 18:06:00,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 18:06:00,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:06:00,918 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2019-01-18 18:06:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:01,092 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-01-18 18:06:01,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 18:06:01,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-01-18 18:06:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:01,094 INFO L225 Difference]: With dead ends: 15 [2019-01-18 18:06:01,094 INFO L226 Difference]: Without dead ends: 14 [2019-01-18 18:06:01,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-01-18 18:06:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-18 18:06:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-01-18 18:06:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-01-18 18:06:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-01-18 18:06:01,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2019-01-18 18:06:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:01,099 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-01-18 18:06:01,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 18:06:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-01-18 18:06:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-01-18 18:06:01,100 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:01,100 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1] [2019-01-18 18:06:01,101 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1291763032, now seen corresponding path program 2 times [2019-01-18 18:06:01,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:01,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:01,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:01,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:01,103 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:01,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:01,262 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:01,262 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:01,262 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:01,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:01,263 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 [2019-01-18 18:06:01,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:01,292 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:01,314 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 18:06:01,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:01,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:01,331 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 [2019-01-18 18:06:01,331 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:01,418 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:01,418 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:01,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:01,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:01,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 18:06:01,805 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:01,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 18:06:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 18:06:01,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:06:01,807 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-01-18 18:06:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:01,950 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-01-18 18:06:01,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 18:06:01,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-01-18 18:06:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:01,951 INFO L225 Difference]: With dead ends: 19 [2019-01-18 18:06:01,951 INFO L226 Difference]: Without dead ends: 18 [2019-01-18 18:06:01,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2019-01-18 18:06:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-01-18 18:06:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-01-18 18:06:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-18 18:06:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-01-18 18:06:01,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2019-01-18 18:06:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:01,956 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-01-18 18:06:01,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 18:06:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-01-18 18:06:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-01-18 18:06:01,957 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:01,957 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1] [2019-01-18 18:06:01,957 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:01,958 INFO L82 PathProgramCache]: Analyzing trace with hash 172253585, now seen corresponding path program 3 times [2019-01-18 18:06:01,958 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:01,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:01,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:01,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:01,959 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:02,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:02,083 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:02,083 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:02,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:02,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:02,083 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:06:02,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:02,092 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:02,104 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:02,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:02,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:02,112 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 [2019-01-18 18:06:02,113 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:02,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:02,145 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:02,241 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:02,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:02,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 18:06:02,309 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:02,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 18:06:02,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 18:06:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:06:02,311 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2019-01-18 18:06:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:02,449 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-01-18 18:06:02,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 18:06:02,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-01-18 18:06:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:02,450 INFO L225 Difference]: With dead ends: 23 [2019-01-18 18:06:02,450 INFO L226 Difference]: Without dead ends: 22 [2019-01-18 18:06:02,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=97, Unknown=0, NotChecked=0, Total=182 [2019-01-18 18:06:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-01-18 18:06:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-01-18 18:06:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-01-18 18:06:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-01-18 18:06:02,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2019-01-18 18:06:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:02,456 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-01-18 18:06:02,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 18:06:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-01-18 18:06:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-01-18 18:06:02,457 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:02,457 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1] [2019-01-18 18:06:02,457 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:02,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1489288886, now seen corresponding path program 4 times [2019-01-18 18:06:02,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:02,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:02,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:02,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:02,459 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:02,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:02,570 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:02,570 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:02,570 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:02,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:02,571 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 [2019-01-18 18:06:02,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:02,581 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:02,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:02,619 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 [2019-01-18 18:06:02,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:02,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:02,632 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:02,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:03,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:03,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 18:06:03,084 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:03,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 18:06:03,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 18:06:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:06:03,086 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2019-01-18 18:06:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:03,164 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-01-18 18:06:03,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 18:06:03,164 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-01-18 18:06:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:03,165 INFO L225 Difference]: With dead ends: 27 [2019-01-18 18:06:03,165 INFO L226 Difference]: Without dead ends: 26 [2019-01-18 18:06:03,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2019-01-18 18:06:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-01-18 18:06:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-01-18 18:06:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-18 18:06:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-01-18 18:06:03,170 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 20 [2019-01-18 18:06:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:03,171 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-01-18 18:06:03,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 18:06:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-01-18 18:06:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-01-18 18:06:03,172 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:03,172 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1] [2019-01-18 18:06:03,172 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:03,173 INFO L82 PathProgramCache]: Analyzing trace with hash 702127235, now seen corresponding path program 5 times [2019-01-18 18:06:03,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:03,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:03,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:03,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:03,174 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:03,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:03,324 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:03,324 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:03,324 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:03,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:03,324 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 [2019-01-18 18:06:03,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:03,334 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:03,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-01-18 18:06:03,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:03,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:03,375 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 [2019-01-18 18:06:03,376 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:03,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:03,451 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:03,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:03,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:03,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-18 18:06:03,775 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:03,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-18 18:06:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-18 18:06:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-18 18:06:03,777 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 14 states. [2019-01-18 18:06:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:03,854 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-01-18 18:06:03,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 18:06:03,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-01-18 18:06:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:03,856 INFO L225 Difference]: With dead ends: 31 [2019-01-18 18:06:03,856 INFO L226 Difference]: Without dead ends: 30 [2019-01-18 18:06:03,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=205, Unknown=0, NotChecked=0, Total=380 [2019-01-18 18:06:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-18 18:06:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-01-18 18:06:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-18 18:06:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-01-18 18:06:03,862 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 24 [2019-01-18 18:06:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:03,863 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-01-18 18:06:03,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-18 18:06:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-01-18 18:06:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-01-18 18:06:03,864 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:03,864 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1] [2019-01-18 18:06:03,864 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash 854963004, now seen corresponding path program 6 times [2019-01-18 18:06:03,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:03,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:03,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:03,866 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:04,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:04,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:04,028 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:04,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:04,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:04,029 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 [2019-01-18 18:06:04,038 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:04,038 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:04,058 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:04,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:04,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:04,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-18 18:06:04,067 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:04,075 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:04,075 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:04,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:04,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:04,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2019-01-18 18:06:04,415 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:04,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-01-18 18:06:04,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-01-18 18:06:04,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-01-18 18:06:04,416 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 16 states. [2019-01-18 18:06:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:04,500 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-01-18 18:06:04,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 18:06:04,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-01-18 18:06:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:04,503 INFO L225 Difference]: With dead ends: 35 [2019-01-18 18:06:04,503 INFO L226 Difference]: Without dead ends: 34 [2019-01-18 18:06:04,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2019-01-18 18:06:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-01-18 18:06:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-01-18 18:06:04,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-01-18 18:06:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-01-18 18:06:04,508 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 28 [2019-01-18 18:06:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:04,509 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-01-18 18:06:04,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-01-18 18:06:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-01-18 18:06:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-01-18 18:06:04,510 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:04,510 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1] [2019-01-18 18:06:04,510 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1908030091, now seen corresponding path program 7 times [2019-01-18 18:06:04,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:04,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:04,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:04,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:04,512 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:04,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:04,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:04,676 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:04,676 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:04,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:04,676 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:06:04,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:04,685 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:04,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:04,703 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 [2019-01-18 18:06:04,704 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:04,718 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:04,718 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:04,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:05,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:05,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2019-01-18 18:06:05,003 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:05,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-01-18 18:06:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-01-18 18:06:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-01-18 18:06:05,005 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 18 states. [2019-01-18 18:06:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:05,191 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-01-18 18:06:05,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 18:06:05,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2019-01-18 18:06:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:05,194 INFO L225 Difference]: With dead ends: 39 [2019-01-18 18:06:05,194 INFO L226 Difference]: Without dead ends: 38 [2019-01-18 18:06:05,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=353, Unknown=0, NotChecked=0, Total=650 [2019-01-18 18:06:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-01-18 18:06:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-01-18 18:06:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-18 18:06:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-01-18 18:06:05,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 32 [2019-01-18 18:06:05,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:05,200 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-01-18 18:06:05,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-01-18 18:06:05,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-01-18 18:06:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-01-18 18:06:05,201 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:05,201 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1] [2019-01-18 18:06:05,201 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1033891026, now seen corresponding path program 8 times [2019-01-18 18:06:05,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:05,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:05,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:05,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:05,203 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:05,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:05,354 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:05,354 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:05,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:05,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:05,354 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 [2019-01-18 18:06:05,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:05,366 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:05,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-01-18 18:06:05,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:05,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:05,402 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 [2019-01-18 18:06:05,403 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:05,411 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:05,411 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:05,529 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:05,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:05,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2019-01-18 18:06:05,879 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:05,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-01-18 18:06:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-01-18 18:06:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-18 18:06:05,880 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 20 states. [2019-01-18 18:06:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:06,010 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-01-18 18:06:06,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 18:06:06,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2019-01-18 18:06:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:06,012 INFO L225 Difference]: With dead ends: 43 [2019-01-18 18:06:06,012 INFO L226 Difference]: Without dead ends: 42 [2019-01-18 18:06:06,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2019-01-18 18:06:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-01-18 18:06:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-01-18 18:06:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-18 18:06:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-01-18 18:06:06,020 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 36 [2019-01-18 18:06:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:06,020 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-01-18 18:06:06,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-01-18 18:06:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-01-18 18:06:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-01-18 18:06:06,021 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:06,021 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1] [2019-01-18 18:06:06,021 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1598366617, now seen corresponding path program 9 times [2019-01-18 18:06:06,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:06,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:06,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:06,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:06,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:06,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:06,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:06,255 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:06,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:06,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:06,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:06:06,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:06,264 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:06,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:06,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:06,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:06,300 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 [2019-01-18 18:06:06,301 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:06,374 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:06,374 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:06,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:06,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:06,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2019-01-18 18:06:06,802 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:06,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-01-18 18:06:06,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-01-18 18:06:06,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-18 18:06:06,804 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 22 states. [2019-01-18 18:06:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:06,897 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-01-18 18:06:06,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-18 18:06:06,898 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2019-01-18 18:06:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:06,899 INFO L225 Difference]: With dead ends: 47 [2019-01-18 18:06:06,899 INFO L226 Difference]: Without dead ends: 46 [2019-01-18 18:06:06,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=541, Unknown=0, NotChecked=0, Total=992 [2019-01-18 18:06:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-01-18 18:06:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-01-18 18:06:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-01-18 18:06:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-01-18 18:06:06,906 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 40 [2019-01-18 18:06:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:06,906 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-01-18 18:06:06,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-01-18 18:06:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-01-18 18:06:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-01-18 18:06:06,907 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:06,907 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1] [2019-01-18 18:06:06,908 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:06,908 INFO L82 PathProgramCache]: Analyzing trace with hash -710123232, now seen corresponding path program 10 times [2019-01-18 18:06:06,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:06,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:06,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:06,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:06,909 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:07,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:07,631 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:07,631 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:07,631 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:07,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:07,632 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 [2019-01-18 18:06:07,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:07,641 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:07,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:07,669 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 [2019-01-18 18:06:07,669 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:07,679 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:07,679 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:07,870 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:08,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:08,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2019-01-18 18:06:08,165 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:08,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-01-18 18:06:08,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-01-18 18:06:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-18 18:06:08,167 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 24 states. [2019-01-18 18:06:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:08,267 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-01-18 18:06:08,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-18 18:06:08,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 44 [2019-01-18 18:06:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:08,269 INFO L225 Difference]: With dead ends: 51 [2019-01-18 18:06:08,269 INFO L226 Difference]: Without dead ends: 50 [2019-01-18 18:06:08,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2019-01-18 18:06:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-01-18 18:06:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-01-18 18:06:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-01-18 18:06:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-01-18 18:06:08,275 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 44 [2019-01-18 18:06:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:08,275 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-01-18 18:06:08,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-01-18 18:06:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-01-18 18:06:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-01-18 18:06:08,276 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:08,276 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1] [2019-01-18 18:06:08,276 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2020270425, now seen corresponding path program 11 times [2019-01-18 18:06:08,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:08,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:08,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:08,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:08,278 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:08,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:08,456 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:08,456 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:08,456 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:08,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:08,457 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 [2019-01-18 18:06:08,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:08,465 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:08,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-01-18 18:06:08,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:08,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:08,504 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 [2019-01-18 18:06:08,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:08,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:08,537 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:08,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:09,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:09,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2019-01-18 18:06:09,331 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:09,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-01-18 18:06:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-01-18 18:06:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-18 18:06:09,332 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 26 states. [2019-01-18 18:06:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:09,426 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-01-18 18:06:09,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-01-18 18:06:09,427 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 48 [2019-01-18 18:06:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:09,428 INFO L225 Difference]: With dead ends: 55 [2019-01-18 18:06:09,428 INFO L226 Difference]: Without dead ends: 54 [2019-01-18 18:06:09,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=637, Invalid=769, Unknown=0, NotChecked=0, Total=1406 [2019-01-18 18:06:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-01-18 18:06:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-01-18 18:06:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-01-18 18:06:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-01-18 18:06:09,436 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 48 [2019-01-18 18:06:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:09,436 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-01-18 18:06:09,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-01-18 18:06:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-01-18 18:06:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-01-18 18:06:09,437 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:09,438 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1] [2019-01-18 18:06:09,438 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:09,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1693672174, now seen corresponding path program 12 times [2019-01-18 18:06:09,438 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:09,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:09,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:09,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:09,439 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:09,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:09,971 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:09,971 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:09,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:09,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:09,971 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 [2019-01-18 18:06:09,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:09,980 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:09,998 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:09,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:10,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:10,009 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 [2019-01-18 18:06:10,009 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:10,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:10,013 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:10,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:10,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:10,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2019-01-18 18:06:10,572 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:10,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-01-18 18:06:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-01-18 18:06:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-18 18:06:10,574 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 28 states. [2019-01-18 18:06:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:10,683 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-01-18 18:06:10,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-01-18 18:06:10,684 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2019-01-18 18:06:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:10,685 INFO L225 Difference]: With dead ends: 59 [2019-01-18 18:06:10,685 INFO L226 Difference]: Without dead ends: 58 [2019-01-18 18:06:10,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2019-01-18 18:06:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-01-18 18:06:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-01-18 18:06:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-18 18:06:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-01-18 18:06:10,693 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 52 [2019-01-18 18:06:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:10,693 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-01-18 18:06:10,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-01-18 18:06:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-01-18 18:06:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-01-18 18:06:10,694 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:10,694 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1] [2019-01-18 18:06:10,695 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash -628632501, now seen corresponding path program 13 times [2019-01-18 18:06:10,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:10,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:10,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:10,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:10,696 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:11,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:11,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:11,054 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:11,055 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:11,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:11,055 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:06:11,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:11,066 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:11,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:11,094 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 [2019-01-18 18:06:11,095 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:11,100 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:11,101 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:11,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:12,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:12,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2019-01-18 18:06:12,218 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:12,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-01-18 18:06:12,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-01-18 18:06:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-18 18:06:12,220 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 30 states. [2019-01-18 18:06:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:12,431 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-01-18 18:06:12,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-01-18 18:06:12,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2019-01-18 18:06:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:12,432 INFO L225 Difference]: With dead ends: 63 [2019-01-18 18:06:12,433 INFO L226 Difference]: Without dead ends: 62 [2019-01-18 18:06:12,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=855, Invalid=1037, Unknown=0, NotChecked=0, Total=1892 [2019-01-18 18:06:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-18 18:06:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-01-18 18:06:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-18 18:06:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-01-18 18:06:12,439 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 56 [2019-01-18 18:06:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:12,439 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-01-18 18:06:12,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-01-18 18:06:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-01-18 18:06:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-01-18 18:06:12,440 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:12,441 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1] [2019-01-18 18:06:12,441 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash -290273532, now seen corresponding path program 14 times [2019-01-18 18:06:12,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:12,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:12,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:12,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:12,442 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:12,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:12,771 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:12,771 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:12,771 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:12,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:12,771 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 [2019-01-18 18:06:12,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:12,781 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:12,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-01-18 18:06:12,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:12,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:12,827 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 [2019-01-18 18:06:12,827 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:12,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:12,838 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:13,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:14,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:14,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2019-01-18 18:06:14,477 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:14,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-01-18 18:06:14,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-01-18 18:06:14,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-01-18 18:06:14,479 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 32 states. [2019-01-18 18:06:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:14,666 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-01-18 18:06:14,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-01-18 18:06:14,667 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 60 [2019-01-18 18:06:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:14,668 INFO L225 Difference]: With dead ends: 67 [2019-01-18 18:06:14,668 INFO L226 Difference]: Without dead ends: 66 [2019-01-18 18:06:14,670 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2019-01-18 18:06:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-01-18 18:06:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-01-18 18:06:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-18 18:06:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-01-18 18:06:14,675 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 60 [2019-01-18 18:06:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:14,675 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-01-18 18:06:14,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-01-18 18:06:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-01-18 18:06:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-01-18 18:06:14,676 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:14,677 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1] [2019-01-18 18:06:14,677 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash 977515837, now seen corresponding path program 15 times [2019-01-18 18:06:14,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:14,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:14,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:14,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:14,678 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:15,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:15,280 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:15,280 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:15,280 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:15,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:15,280 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 [2019-01-18 18:06:15,290 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:15,290 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:15,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:15,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:15,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:15,324 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 [2019-01-18 18:06:15,325 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:15,333 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:15,333 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:15,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:16,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:16,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2019-01-18 18:06:16,068 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:16,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-01-18 18:06:16,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-01-18 18:06:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-01-18 18:06:16,070 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 34 states. [2019-01-18 18:06:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:16,200 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-01-18 18:06:16,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-01-18 18:06:16,201 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 64 [2019-01-18 18:06:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:16,202 INFO L225 Difference]: With dead ends: 71 [2019-01-18 18:06:16,202 INFO L226 Difference]: Without dead ends: 70 [2019-01-18 18:06:16,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1105, Invalid=1345, Unknown=0, NotChecked=0, Total=2450 [2019-01-18 18:06:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-18 18:06:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-01-18 18:06:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-01-18 18:06:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-01-18 18:06:16,209 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 64 [2019-01-18 18:06:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:16,209 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-01-18 18:06:16,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-01-18 18:06:16,209 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-01-18 18:06:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-01-18 18:06:16,210 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:16,211 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1] [2019-01-18 18:06:16,211 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1523638006, now seen corresponding path program 16 times [2019-01-18 18:06:16,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:16,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:16,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:16,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:16,212 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:16,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:16,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:16,504 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:16,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:16,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:16,505 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 [2019-01-18 18:06:16,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:16,515 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:16,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:16,561 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 [2019-01-18 18:06:16,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:16,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:16,566 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:18,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:18,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:18,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2019-01-18 18:06:18,834 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:18,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-01-18 18:06:18,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-01-18 18:06:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-18 18:06:18,835 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 36 states. [2019-01-18 18:06:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:18,947 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-01-18 18:06:18,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-01-18 18:06:18,947 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 68 [2019-01-18 18:06:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:18,948 INFO L225 Difference]: With dead ends: 75 [2019-01-18 18:06:18,948 INFO L226 Difference]: Without dead ends: 74 [2019-01-18 18:06:18,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1242, Invalid=1514, Unknown=0, NotChecked=0, Total=2756 [2019-01-18 18:06:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-01-18 18:06:18,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-01-18 18:06:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-01-18 18:06:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-01-18 18:06:18,954 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 68 [2019-01-18 18:06:18,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:18,955 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-01-18 18:06:18,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-01-18 18:06:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-01-18 18:06:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-01-18 18:06:18,956 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:18,956 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1] [2019-01-18 18:06:18,956 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1194294225, now seen corresponding path program 17 times [2019-01-18 18:06:18,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:18,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:18,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:18,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:18,958 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:19,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:19,517 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:19,517 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:19,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:19,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:19,518 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 [2019-01-18 18:06:19,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:19,527 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:19,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-01-18 18:06:19,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:19,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:19,590 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 [2019-01-18 18:06:19,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:19,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:19,602 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:19,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:20,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:20,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2019-01-18 18:06:20,584 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:20,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-01-18 18:06:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-01-18 18:06:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-01-18 18:06:20,586 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 38 states. [2019-01-18 18:06:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:20,696 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-01-18 18:06:20,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-01-18 18:06:20,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 72 [2019-01-18 18:06:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:20,698 INFO L225 Difference]: With dead ends: 79 [2019-01-18 18:06:20,698 INFO L226 Difference]: Without dead ends: 78 [2019-01-18 18:06:20,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2019-01-18 18:06:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-01-18 18:06:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-01-18 18:06:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-01-18 18:06:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-01-18 18:06:20,704 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 72 [2019-01-18 18:06:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:20,705 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-01-18 18:06:20,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-01-18 18:06:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-01-18 18:06:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-01-18 18:06:20,706 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:20,706 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1] [2019-01-18 18:06:20,706 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:20,706 INFO L82 PathProgramCache]: Analyzing trace with hash 395896040, now seen corresponding path program 18 times [2019-01-18 18:06:20,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:20,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:20,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:20,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:20,707 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:21,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:21,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:21,089 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:21,089 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:21,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:21,090 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 [2019-01-18 18:06:21,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:21,100 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:21,124 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:21,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:21,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:21,135 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 [2019-01-18 18:06:21,136 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:21,143 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:21,143 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:21,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:21,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:21,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2019-01-18 18:06:21,999 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:21,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-01-18 18:06:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-01-18 18:06:22,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-18 18:06:22,001 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 40 states. [2019-01-18 18:06:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:22,144 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-01-18 18:06:22,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-01-18 18:06:22,144 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 76 [2019-01-18 18:06:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:22,145 INFO L225 Difference]: With dead ends: 83 [2019-01-18 18:06:22,145 INFO L226 Difference]: Without dead ends: 82 [2019-01-18 18:06:22,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2019-01-18 18:06:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-18 18:06:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-01-18 18:06:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-01-18 18:06:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-01-18 18:06:22,151 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 76 [2019-01-18 18:06:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:22,151 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-01-18 18:06:22,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-01-18 18:06:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-01-18 18:06:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-01-18 18:06:22,152 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:22,152 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1] [2019-01-18 18:06:22,152 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:22,152 INFO L82 PathProgramCache]: Analyzing trace with hash 627065121, now seen corresponding path program 19 times [2019-01-18 18:06:22,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:22,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:22,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:22,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:22,153 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:22,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:22,530 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:22,530 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:22,530 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:22,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:22,530 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 [2019-01-18 18:06:22,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:22,542 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:22,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:22,586 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 [2019-01-18 18:06:22,587 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:22,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:22,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:23,028 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:23,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:23,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2019-01-18 18:06:23,564 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:23,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-01-18 18:06:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-01-18 18:06:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-18 18:06:23,566 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 42 states. [2019-01-18 18:06:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:23,702 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-01-18 18:06:23,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-01-18 18:06:23,703 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 80 [2019-01-18 18:06:23,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:23,704 INFO L225 Difference]: With dead ends: 87 [2019-01-18 18:06:23,704 INFO L226 Difference]: Without dead ends: 86 [2019-01-18 18:06:23,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1701, Invalid=2081, Unknown=0, NotChecked=0, Total=3782 [2019-01-18 18:06:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-01-18 18:06:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-01-18 18:06:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-01-18 18:06:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-01-18 18:06:23,710 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 80 [2019-01-18 18:06:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:23,710 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-01-18 18:06:23,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-01-18 18:06:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-01-18 18:06:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-01-18 18:06:23,711 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:23,711 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1] [2019-01-18 18:06:23,711 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:23,712 INFO L82 PathProgramCache]: Analyzing trace with hash 188537050, now seen corresponding path program 20 times [2019-01-18 18:06:23,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:23,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:23,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:23,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:23,713 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:24,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:24,171 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:24,171 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:24,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:24,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:24,171 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 [2019-01-18 18:06:24,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:24,188 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:24,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-01-18 18:06:24,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:24,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:24,253 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 [2019-01-18 18:06:24,253 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:24,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:24,270 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:24,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:25,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:25,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2019-01-18 18:06:25,485 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:25,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-01-18 18:06:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-01-18 18:06:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-18 18:06:25,487 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 44 states. [2019-01-18 18:06:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:25,663 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-01-18 18:06:25,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-01-18 18:06:25,663 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 84 [2019-01-18 18:06:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:25,664 INFO L225 Difference]: With dead ends: 91 [2019-01-18 18:06:25,665 INFO L226 Difference]: Without dead ends: 90 [2019-01-18 18:06:25,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1870, Invalid=2290, Unknown=0, NotChecked=0, Total=4160 [2019-01-18 18:06:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-01-18 18:06:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-01-18 18:06:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-01-18 18:06:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-01-18 18:06:25,670 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 84 [2019-01-18 18:06:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:25,670 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-01-18 18:06:25,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-01-18 18:06:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-01-18 18:06:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-01-18 18:06:25,670 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:25,671 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1] [2019-01-18 18:06:25,671 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash -47911917, now seen corresponding path program 21 times [2019-01-18 18:06:25,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:25,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:25,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:25,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:25,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:26,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:26,030 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:26,030 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:26,030 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:26,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:26,030 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 [2019-01-18 18:06:26,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:26,043 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:26,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:26,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:26,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:26,088 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 [2019-01-18 18:06:26,088 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:26,092 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:26,092 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:26,440 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:27,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:27,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2019-01-18 18:06:27,082 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:27,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-01-18 18:06:27,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-01-18 18:06:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-18 18:06:27,084 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 46 states. [2019-01-18 18:06:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:27,270 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-01-18 18:06:27,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-01-18 18:06:27,273 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 88 [2019-01-18 18:06:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:27,274 INFO L225 Difference]: With dead ends: 95 [2019-01-18 18:06:27,274 INFO L226 Difference]: Without dead ends: 94 [2019-01-18 18:06:27,275 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2047, Invalid=2509, Unknown=0, NotChecked=0, Total=4556 [2019-01-18 18:06:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-01-18 18:06:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-01-18 18:06:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-01-18 18:06:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-01-18 18:06:27,278 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 88 [2019-01-18 18:06:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:27,278 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-01-18 18:06:27,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-01-18 18:06:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-01-18 18:06:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-01-18 18:06:27,279 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:27,279 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1] [2019-01-18 18:06:27,279 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:27,279 INFO L82 PathProgramCache]: Analyzing trace with hash -907101492, now seen corresponding path program 22 times [2019-01-18 18:06:27,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:27,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:27,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:27,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:27,281 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:27,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:27,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:27,778 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:27,778 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:27,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:27,778 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 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 [2019-01-18 18:06:27,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:27,786 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:27,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:27,822 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 [2019-01-18 18:06:27,822 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:27,833 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:27,833 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:28,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:28,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:28,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2019-01-18 18:06:28,986 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:28,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-01-18 18:06:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-01-18 18:06:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-01-18 18:06:28,988 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 48 states. [2019-01-18 18:06:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:29,140 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-01-18 18:06:29,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-01-18 18:06:29,145 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 92 [2019-01-18 18:06:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:29,146 INFO L225 Difference]: With dead ends: 99 [2019-01-18 18:06:29,146 INFO L226 Difference]: Without dead ends: 98 [2019-01-18 18:06:29,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2019-01-18 18:06:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-18 18:06:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-01-18 18:06:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-01-18 18:06:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-01-18 18:06:29,150 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 92 [2019-01-18 18:06:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:29,150 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-01-18 18:06:29,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-01-18 18:06:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-01-18 18:06:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-01-18 18:06:29,151 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:29,151 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1] [2019-01-18 18:06:29,151 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1800439045, now seen corresponding path program 23 times [2019-01-18 18:06:29,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:29,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:29,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:29,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:29,153 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:29,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:29,902 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:29,902 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:29,902 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:29,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:29,902 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 [2019-01-18 18:06:29,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:29,911 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:29,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-01-18 18:06:29,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:29,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:29,981 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 [2019-01-18 18:06:29,981 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:29,990 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:29,990 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:30,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:31,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:31,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 72 [2019-01-18 18:06:31,357 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:31,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-01-18 18:06:31,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-01-18 18:06:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-01-18 18:06:31,359 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 50 states. [2019-01-18 18:06:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:31,540 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-01-18 18:06:31,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-01-18 18:06:31,540 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 96 [2019-01-18 18:06:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:31,542 INFO L225 Difference]: With dead ends: 103 [2019-01-18 18:06:31,542 INFO L226 Difference]: Without dead ends: 102 [2019-01-18 18:06:31,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2425, Invalid=2977, Unknown=0, NotChecked=0, Total=5402 [2019-01-18 18:06:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-01-18 18:06:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-01-18 18:06:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-01-18 18:06:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-01-18 18:06:31,547 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 96 [2019-01-18 18:06:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:31,547 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-01-18 18:06:31,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-01-18 18:06:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-01-18 18:06:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-01-18 18:06:31,548 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:31,548 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1] [2019-01-18 18:06:31,549 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1780446530, now seen corresponding path program 24 times [2019-01-18 18:06:31,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:31,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:31,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:31,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:31,550 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:32,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:32,039 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:32,039 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:32,040 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:32,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:32,040 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 [2019-01-18 18:06:32,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:32,049 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:32,095 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:32,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:32,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:32,108 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 [2019-01-18 18:06:32,108 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:32,118 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:32,118 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:32,587 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:33,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:33,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2019-01-18 18:06:33,435 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:33,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-01-18 18:06:33,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-01-18 18:06:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-01-18 18:06:33,436 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 52 states. [2019-01-18 18:06:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:33,633 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-01-18 18:06:33,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-01-18 18:06:33,634 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 100 [2019-01-18 18:06:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:33,634 INFO L225 Difference]: With dead ends: 107 [2019-01-18 18:06:33,634 INFO L226 Difference]: Without dead ends: 106 [2019-01-18 18:06:33,635 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2626, Invalid=3226, Unknown=0, NotChecked=0, Total=5852 [2019-01-18 18:06:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-18 18:06:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-01-18 18:06:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-01-18 18:06:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-01-18 18:06:33,640 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 100 [2019-01-18 18:06:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:33,640 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-01-18 18:06:33,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-01-18 18:06:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-01-18 18:06:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-01-18 18:06:33,641 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:33,641 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1] [2019-01-18 18:06:33,642 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1226116087, now seen corresponding path program 25 times [2019-01-18 18:06:33,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:33,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:33,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:33,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:33,643 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:34,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:34,119 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:34,119 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:34,119 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:34,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:34,120 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:06:34,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:34,129 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:34,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:34,164 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 [2019-01-18 18:06:34,165 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:34,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:34,175 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:34,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:35,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:35,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 78 [2019-01-18 18:06:35,811 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:35,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-01-18 18:06:35,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-01-18 18:06:35,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-18 18:06:35,813 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 54 states. [2019-01-18 18:06:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:36,018 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-01-18 18:06:36,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-01-18 18:06:36,019 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 104 [2019-01-18 18:06:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:36,020 INFO L225 Difference]: With dead ends: 111 [2019-01-18 18:06:36,020 INFO L226 Difference]: Without dead ends: 110 [2019-01-18 18:06:36,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2835, Invalid=3485, Unknown=0, NotChecked=0, Total=6320 [2019-01-18 18:06:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-01-18 18:06:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-01-18 18:06:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-01-18 18:06:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-01-18 18:06:36,027 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 104 [2019-01-18 18:06:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:36,027 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-01-18 18:06:36,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-01-18 18:06:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-01-18 18:06:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-01-18 18:06:36,028 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:36,028 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1] [2019-01-18 18:06:36,028 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:36,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1598310576, now seen corresponding path program 26 times [2019-01-18 18:06:36,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:36,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:36,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:36,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:36,029 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:36,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:36,552 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:36,552 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:36,552 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:36,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:36,552 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 [2019-01-18 18:06:36,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:36,562 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:36,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-01-18 18:06:36,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:36,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:36,641 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 [2019-01-18 18:06:36,641 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:36,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:36,650 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:37,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:38,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:38,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2019-01-18 18:06:38,224 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:38,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-01-18 18:06:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-01-18 18:06:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-18 18:06:38,225 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 56 states. [2019-01-18 18:06:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:38,410 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2019-01-18 18:06:38,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-01-18 18:06:38,411 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 108 [2019-01-18 18:06:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:38,412 INFO L225 Difference]: With dead ends: 115 [2019-01-18 18:06:38,412 INFO L226 Difference]: Without dead ends: 114 [2019-01-18 18:06:38,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3052, Invalid=3754, Unknown=0, NotChecked=0, Total=6806 [2019-01-18 18:06:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-01-18 18:06:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-01-18 18:06:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-01-18 18:06:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2019-01-18 18:06:38,418 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 108 [2019-01-18 18:06:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:38,419 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2019-01-18 18:06:38,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-01-18 18:06:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2019-01-18 18:06:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-01-18 18:06:38,419 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:38,420 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1] [2019-01-18 18:06:38,420 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash 497320169, now seen corresponding path program 27 times [2019-01-18 18:06:38,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:38,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:38,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:38,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:38,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:39,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:39,262 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:39,262 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:39,262 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:39,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:39,262 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 [2019-01-18 18:06:39,272 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:39,273 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:39,304 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:39,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:39,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:39,338 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 [2019-01-18 18:06:39,339 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:39,364 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:39,364 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:40,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:41,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:41,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 84 [2019-01-18 18:06:41,203 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:41,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-01-18 18:06:41,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-01-18 18:06:41,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-18 18:06:41,204 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 58 states. [2019-01-18 18:06:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:41,397 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2019-01-18 18:06:41,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-01-18 18:06:41,397 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 112 [2019-01-18 18:06:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:41,398 INFO L225 Difference]: With dead ends: 119 [2019-01-18 18:06:41,398 INFO L226 Difference]: Without dead ends: 118 [2019-01-18 18:06:41,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3277, Invalid=4033, Unknown=0, NotChecked=0, Total=7310 [2019-01-18 18:06:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-01-18 18:06:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-01-18 18:06:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-01-18 18:06:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-01-18 18:06:41,403 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 112 [2019-01-18 18:06:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:41,403 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-01-18 18:06:41,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-01-18 18:06:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-01-18 18:06:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-01-18 18:06:41,404 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:41,404 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1] [2019-01-18 18:06:41,404 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1001655134, now seen corresponding path program 28 times [2019-01-18 18:06:41,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:41,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:41,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:41,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:41,405 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:41,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:41,998 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:41,998 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:41,999 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:41,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:41,999 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:06:42,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:42,008 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:42,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:42,052 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 [2019-01-18 18:06:42,052 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:42,064 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:42,065 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:42,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:44,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:44,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2019-01-18 18:06:44,008 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:44,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-01-18 18:06:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-01-18 18:06:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-18 18:06:44,010 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 60 states. [2019-01-18 18:06:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:44,222 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-01-18 18:06:44,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-01-18 18:06:44,222 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 116 [2019-01-18 18:06:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:44,224 INFO L225 Difference]: With dead ends: 123 [2019-01-18 18:06:44,224 INFO L226 Difference]: Without dead ends: 122 [2019-01-18 18:06:44,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3510, Invalid=4322, Unknown=0, NotChecked=0, Total=7832 [2019-01-18 18:06:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-01-18 18:06:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-01-18 18:06:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-01-18 18:06:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-01-18 18:06:44,230 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 116 [2019-01-18 18:06:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:44,230 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-01-18 18:06:44,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-01-18 18:06:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-01-18 18:06:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-01-18 18:06:44,231 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:44,231 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1] [2019-01-18 18:06:44,231 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:44,232 INFO L82 PathProgramCache]: Analyzing trace with hash 506520539, now seen corresponding path program 29 times [2019-01-18 18:06:44,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:44,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:44,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:44,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:44,233 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:45,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:45,108 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:45,108 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:45,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:45,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:45,109 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 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 [2019-01-18 18:06:45,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:45,126 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:45,212 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-01-18 18:06:45,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:45,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:45,248 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 [2019-01-18 18:06:45,249 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:45,346 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:45,347 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:45,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:47,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:47,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 90 [2019-01-18 18:06:47,109 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:47,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-01-18 18:06:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-01-18 18:06:47,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-18 18:06:47,111 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 62 states. [2019-01-18 18:06:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:47,337 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2019-01-18 18:06:47,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-01-18 18:06:47,338 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 120 [2019-01-18 18:06:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:47,339 INFO L225 Difference]: With dead ends: 127 [2019-01-18 18:06:47,339 INFO L226 Difference]: Without dead ends: 126 [2019-01-18 18:06:47,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3751, Invalid=4621, Unknown=0, NotChecked=0, Total=8372 [2019-01-18 18:06:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-01-18 18:06:47,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-01-18 18:06:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-18 18:06:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2019-01-18 18:06:47,344 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 120 [2019-01-18 18:06:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:47,344 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2019-01-18 18:06:47,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-01-18 18:06:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2019-01-18 18:06:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-01-18 18:06:47,345 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:47,345 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1] [2019-01-18 18:06:47,345 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash 287936148, now seen corresponding path program 30 times [2019-01-18 18:06:47,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:47,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:47,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:47,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:47,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:48,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:48,397 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:48,397 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:48,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:48,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:48,397 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 [2019-01-18 18:06:48,408 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:48,408 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:48,445 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:48,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:48,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:48,457 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 [2019-01-18 18:06:48,458 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:48,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:48,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:49,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:50,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:50,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 93 [2019-01-18 18:06:50,655 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:50,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-01-18 18:06:50,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-01-18 18:06:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-18 18:06:50,657 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 64 states. [2019-01-18 18:06:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:50,891 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2019-01-18 18:06:50,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-01-18 18:06:50,892 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 124 [2019-01-18 18:06:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:50,893 INFO L225 Difference]: With dead ends: 131 [2019-01-18 18:06:50,893 INFO L226 Difference]: Without dead ends: 130 [2019-01-18 18:06:50,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2019-01-18 18:06:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-01-18 18:06:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2019-01-18 18:06:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-01-18 18:06:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2019-01-18 18:06:50,899 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 124 [2019-01-18 18:06:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:50,900 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2019-01-18 18:06:50,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-01-18 18:06:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2019-01-18 18:06:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-01-18 18:06:50,901 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:50,901 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1] [2019-01-18 18:06:50,901 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 770454733, now seen corresponding path program 31 times [2019-01-18 18:06:50,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:50,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:50,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:50,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:50,903 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:51,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:51,545 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:51,545 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:51,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:51,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:51,545 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 [2019-01-18 18:06:51,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:51,554 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:06:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:51,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:51,601 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 [2019-01-18 18:06:51,601 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:51,615 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:51,615 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:52,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:53,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:53,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 96 [2019-01-18 18:06:53,855 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:53,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-01-18 18:06:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-01-18 18:06:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-18 18:06:53,857 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 66 states. [2019-01-18 18:06:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:54,083 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2019-01-18 18:06:54,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-01-18 18:06:54,084 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 128 [2019-01-18 18:06:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:54,085 INFO L225 Difference]: With dead ends: 135 [2019-01-18 18:06:54,085 INFO L226 Difference]: Without dead ends: 134 [2019-01-18 18:06:54,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4257, Invalid=5249, Unknown=0, NotChecked=0, Total=9506 [2019-01-18 18:06:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-18 18:06:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-01-18 18:06:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-01-18 18:06:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2019-01-18 18:06:54,092 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 128 [2019-01-18 18:06:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:54,092 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2019-01-18 18:06:54,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-01-18 18:06:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2019-01-18 18:06:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-01-18 18:06:54,093 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:54,093 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1] [2019-01-18 18:06:54,093 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:54,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1074730630, now seen corresponding path program 32 times [2019-01-18 18:06:54,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:54,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:54,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:06:54,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:54,095 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:56,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:56,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:56,055 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:56,055 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:56,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:56,055 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:06:56,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:06:56,063 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:06:56,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-01-18 18:06:56,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:56,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:56,230 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 [2019-01-18 18:06:56,231 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:56,240 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:56,241 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:06:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:57,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:06:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:58,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:06:58,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 99 [2019-01-18 18:06:58,561 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:06:58,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-01-18 18:06:58,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-01-18 18:06:58,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-18 18:06:58,563 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 68 states. [2019-01-18 18:06:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:06:58,802 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2019-01-18 18:06:58,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-01-18 18:06:58,803 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 132 [2019-01-18 18:06:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:06:58,804 INFO L225 Difference]: With dead ends: 139 [2019-01-18 18:06:58,804 INFO L226 Difference]: Without dead ends: 138 [2019-01-18 18:06:58,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4522, Invalid=5578, Unknown=0, NotChecked=0, Total=10100 [2019-01-18 18:06:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-01-18 18:06:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2019-01-18 18:06:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-01-18 18:06:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2019-01-18 18:06:58,810 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 132 [2019-01-18 18:06:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:06:58,811 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2019-01-18 18:06:58,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-01-18 18:06:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2019-01-18 18:06:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-01-18 18:06:58,812 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:06:58,812 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1] [2019-01-18 18:06:58,812 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:06:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:06:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash -569871425, now seen corresponding path program 33 times [2019-01-18 18:06:58,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:06:58,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:58,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:06:58,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:06:58,814 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:06:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:06:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:06:59,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:59,586 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:06:59,586 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:06:59,586 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:06:59,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:06:59,587 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 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 [2019-01-18 18:06:59,616 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:06:59,616 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:06:59,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:06:59,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:06:59,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:06:59,676 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 [2019-01-18 18:06:59,677 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:06:59,772 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:06:59,773 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:01,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:02,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:02,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 102 [2019-01-18 18:07:02,520 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:02,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-01-18 18:07:02,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-01-18 18:07:02,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-18 18:07:02,522 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 70 states. [2019-01-18 18:07:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:02,864 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2019-01-18 18:07:02,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-01-18 18:07:02,864 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 136 [2019-01-18 18:07:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:02,866 INFO L225 Difference]: With dead ends: 143 [2019-01-18 18:07:02,866 INFO L226 Difference]: Without dead ends: 142 [2019-01-18 18:07:02,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4795, Invalid=5917, Unknown=0, NotChecked=0, Total=10712 [2019-01-18 18:07:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-01-18 18:07:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2019-01-18 18:07:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-01-18 18:07:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2019-01-18 18:07:02,872 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 136 [2019-01-18 18:07:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:02,872 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2019-01-18 18:07:02,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-01-18 18:07:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2019-01-18 18:07:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-01-18 18:07:02,872 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:02,873 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1] [2019-01-18 18:07:02,873 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -114389896, now seen corresponding path program 34 times [2019-01-18 18:07:02,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:02,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:02,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:02,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:02,874 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:03,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:03,609 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:03,609 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:03,610 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:03,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:03,610 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 [2019-01-18 18:07:03,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:03,620 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:07:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:03,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:03,666 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 [2019-01-18 18:07:03,667 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:03,676 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:03,677 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:04,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:06,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:06,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 105 [2019-01-18 18:07:06,439 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:06,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-01-18 18:07:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-01-18 18:07:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-18 18:07:06,441 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 72 states. [2019-01-18 18:07:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:06,886 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2019-01-18 18:07:06,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-01-18 18:07:06,886 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 140 [2019-01-18 18:07:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:06,888 INFO L225 Difference]: With dead ends: 147 [2019-01-18 18:07:06,888 INFO L226 Difference]: Without dead ends: 146 [2019-01-18 18:07:06,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4830 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5076, Invalid=6266, Unknown=0, NotChecked=0, Total=11342 [2019-01-18 18:07:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-18 18:07:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-01-18 18:07:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-18 18:07:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2019-01-18 18:07:06,894 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 140 [2019-01-18 18:07:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:06,894 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2019-01-18 18:07:06,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-01-18 18:07:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2019-01-18 18:07:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-01-18 18:07:06,896 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:06,896 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1] [2019-01-18 18:07:06,896 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1840750769, now seen corresponding path program 35 times [2019-01-18 18:07:06,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:06,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:06,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:06,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:06,898 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:07,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:07,649 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:07,649 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:07,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:07,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:07,649 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 [2019-01-18 18:07:07,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:07:07,657 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:07:07,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-01-18 18:07:07,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:07,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:07,786 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 [2019-01-18 18:07:07,786 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:07,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:07,803 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:08,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:10,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:10,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 108 [2019-01-18 18:07:10,447 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:10,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-01-18 18:07:10,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-01-18 18:07:10,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-18 18:07:10,449 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 74 states. [2019-01-18 18:07:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:11,018 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2019-01-18 18:07:11,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-01-18 18:07:11,019 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 144 [2019-01-18 18:07:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:11,020 INFO L225 Difference]: With dead ends: 151 [2019-01-18 18:07:11,020 INFO L226 Difference]: Without dead ends: 150 [2019-01-18 18:07:11,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5365, Invalid=6625, Unknown=0, NotChecked=0, Total=11990 [2019-01-18 18:07:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-01-18 18:07:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2019-01-18 18:07:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-01-18 18:07:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2019-01-18 18:07:11,026 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 144 [2019-01-18 18:07:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:11,027 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2019-01-18 18:07:11,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-01-18 18:07:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2019-01-18 18:07:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-01-18 18:07:11,028 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:11,028 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1] [2019-01-18 18:07:11,028 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1833308054, now seen corresponding path program 36 times [2019-01-18 18:07:11,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:11,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:11,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:11,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:11,029 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:11,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:11,836 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:11,836 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:11,837 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:11,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:11,837 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 [2019-01-18 18:07:11,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:07:11,849 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:07:11,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:07:11,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:11,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:11,929 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 [2019-01-18 18:07:11,930 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:12,028 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:12,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:13,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:15,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:15,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 111 [2019-01-18 18:07:15,144 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:15,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-01-18 18:07:15,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-01-18 18:07:15,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-18 18:07:15,147 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 76 states. [2019-01-18 18:07:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:15,573 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2019-01-18 18:07:15,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-01-18 18:07:15,574 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 148 [2019-01-18 18:07:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:15,575 INFO L225 Difference]: With dead ends: 155 [2019-01-18 18:07:15,575 INFO L226 Difference]: Without dead ends: 154 [2019-01-18 18:07:15,577 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5662, Invalid=6994, Unknown=0, NotChecked=0, Total=12656 [2019-01-18 18:07:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-01-18 18:07:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2019-01-18 18:07:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-01-18 18:07:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2019-01-18 18:07:15,582 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 148 [2019-01-18 18:07:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:15,582 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2019-01-18 18:07:15,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-01-18 18:07:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2019-01-18 18:07:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-01-18 18:07:15,583 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:15,584 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1] [2019-01-18 18:07:15,584 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash -903103581, now seen corresponding path program 37 times [2019-01-18 18:07:15,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:15,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:15,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:15,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:15,585 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:17,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:17,473 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:17,473 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:17,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:17,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:17,474 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 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 [2019-01-18 18:07:17,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:17,498 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:07:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:17,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:17,548 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 [2019-01-18 18:07:17,548 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:17,557 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:17,557 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:18,715 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:20,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:20,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 114 [2019-01-18 18:07:20,656 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:20,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-01-18 18:07:20,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-01-18 18:07:20,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-18 18:07:20,658 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 78 states. [2019-01-18 18:07:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:20,963 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2019-01-18 18:07:20,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-01-18 18:07:20,964 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 152 [2019-01-18 18:07:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:20,965 INFO L225 Difference]: With dead ends: 159 [2019-01-18 18:07:20,965 INFO L226 Difference]: Without dead ends: 158 [2019-01-18 18:07:20,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5967, Invalid=7373, Unknown=0, NotChecked=0, Total=13340 [2019-01-18 18:07:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-01-18 18:07:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-01-18 18:07:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-01-18 18:07:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2019-01-18 18:07:20,972 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 152 [2019-01-18 18:07:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:20,972 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2019-01-18 18:07:20,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-01-18 18:07:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2019-01-18 18:07:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-01-18 18:07:20,973 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:20,974 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1] [2019-01-18 18:07:20,974 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash 283329116, now seen corresponding path program 38 times [2019-01-18 18:07:20,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:20,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:20,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:20,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:20,975 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:21,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:21,985 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:21,985 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:21,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:21,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:21,985 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 [2019-01-18 18:07:21,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:07:21,994 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:07:22,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-01-18 18:07:22,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:22,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:22,127 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 [2019-01-18 18:07:22,127 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:22,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:22,139 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:23,150 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:25,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:25,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 117 [2019-01-18 18:07:25,062 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:25,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-01-18 18:07:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-01-18 18:07:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-18 18:07:25,065 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 80 states. [2019-01-18 18:07:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:25,383 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2019-01-18 18:07:25,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-01-18 18:07:25,384 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 156 [2019-01-18 18:07:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:25,385 INFO L225 Difference]: With dead ends: 163 [2019-01-18 18:07:25,385 INFO L226 Difference]: Without dead ends: 162 [2019-01-18 18:07:25,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2019-01-18 18:07:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-01-18 18:07:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2019-01-18 18:07:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-01-18 18:07:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2019-01-18 18:07:25,392 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 156 [2019-01-18 18:07:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:25,392 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2019-01-18 18:07:25,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-01-18 18:07:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2019-01-18 18:07:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-01-18 18:07:25,394 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:25,394 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1] [2019-01-18 18:07:25,394 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1902721899, now seen corresponding path program 39 times [2019-01-18 18:07:25,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:25,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:25,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:25,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:25,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:27,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:27,338 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:27,338 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:27,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:27,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:27,338 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 [2019-01-18 18:07:27,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:07:27,348 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:07:27,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:07:27,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:27,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:27,416 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 [2019-01-18 18:07:27,417 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:27,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:27,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:28,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:30,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:30,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 120 [2019-01-18 18:07:30,537 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:30,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-01-18 18:07:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-01-18 18:07:30,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-18 18:07:30,539 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 82 states. [2019-01-18 18:07:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:31,120 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2019-01-18 18:07:31,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-01-18 18:07:31,120 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 160 [2019-01-18 18:07:31,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:31,122 INFO L225 Difference]: With dead ends: 167 [2019-01-18 18:07:31,122 INFO L226 Difference]: Without dead ends: 166 [2019-01-18 18:07:31,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6601, Invalid=8161, Unknown=0, NotChecked=0, Total=14762 [2019-01-18 18:07:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-01-18 18:07:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2019-01-18 18:07:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-01-18 18:07:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2019-01-18 18:07:31,128 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 160 [2019-01-18 18:07:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:31,129 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2019-01-18 18:07:31,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-01-18 18:07:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2019-01-18 18:07:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-01-18 18:07:31,130 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:31,130 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1] [2019-01-18 18:07:31,130 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash 635208270, now seen corresponding path program 40 times [2019-01-18 18:07:31,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:31,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:31,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:31,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:31,132 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:32,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:32,142 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:32,143 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:32,143 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:32,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:32,143 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 [2019-01-18 18:07:32,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:32,152 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:07:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:32,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:32,221 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 [2019-01-18 18:07:32,222 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:32,295 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:32,295 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:33,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:35,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:35,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2019-01-18 18:07:35,576 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:35,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-01-18 18:07:35,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-01-18 18:07:35,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-18 18:07:35,578 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 84 states. [2019-01-18 18:07:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:35,892 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2019-01-18 18:07:35,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-01-18 18:07:35,893 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 164 [2019-01-18 18:07:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:35,894 INFO L225 Difference]: With dead ends: 171 [2019-01-18 18:07:35,894 INFO L226 Difference]: Without dead ends: 170 [2019-01-18 18:07:35,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6642 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6930, Invalid=8570, Unknown=0, NotChecked=0, Total=15500 [2019-01-18 18:07:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-01-18 18:07:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-01-18 18:07:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-01-18 18:07:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2019-01-18 18:07:35,900 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 164 [2019-01-18 18:07:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:35,901 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2019-01-18 18:07:35,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-01-18 18:07:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2019-01-18 18:07:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-01-18 18:07:35,902 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:35,902 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1] [2019-01-18 18:07:35,902 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash 69909383, now seen corresponding path program 41 times [2019-01-18 18:07:35,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:35,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:35,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:35,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:35,904 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:36,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:36,983 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:36,983 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:36,983 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:36,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:36,983 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 [2019-01-18 18:07:36,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:07:36,991 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:07:37,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-01-18 18:07:37,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:37,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:37,151 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 [2019-01-18 18:07:37,152 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:37,252 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:37,252 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:38,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:40,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:40,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 126 [2019-01-18 18:07:40,829 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:40,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-01-18 18:07:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-01-18 18:07:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-18 18:07:40,831 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 86 states. [2019-01-18 18:07:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:41,179 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2019-01-18 18:07:41,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-01-18 18:07:41,179 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 168 [2019-01-18 18:07:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:41,180 INFO L225 Difference]: With dead ends: 175 [2019-01-18 18:07:41,180 INFO L226 Difference]: Without dead ends: 174 [2019-01-18 18:07:41,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7267, Invalid=8989, Unknown=0, NotChecked=0, Total=16256 [2019-01-18 18:07:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-18 18:07:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2019-01-18 18:07:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-01-18 18:07:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2019-01-18 18:07:41,186 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 168 [2019-01-18 18:07:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:41,187 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2019-01-18 18:07:41,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-01-18 18:07:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2019-01-18 18:07:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-01-18 18:07:41,188 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:41,188 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1] [2019-01-18 18:07:41,188 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:41,189 INFO L82 PathProgramCache]: Analyzing trace with hash 836218944, now seen corresponding path program 42 times [2019-01-18 18:07:41,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:41,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:41,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:41,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:41,190 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:42,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:42,269 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:42,269 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:42,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:42,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:42,269 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 [2019-01-18 18:07:42,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:07:42,279 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:07:42,329 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:07:42,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:42,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:42,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-18 18:07:42,339 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:42,349 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:42,349 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:43,683 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:46,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:46,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 129 [2019-01-18 18:07:46,072 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:46,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-01-18 18:07:46,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-01-18 18:07:46,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-01-18 18:07:46,073 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 88 states. [2019-01-18 18:07:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:46,676 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2019-01-18 18:07:46,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-01-18 18:07:46,676 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 172 [2019-01-18 18:07:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:46,678 INFO L225 Difference]: With dead ends: 179 [2019-01-18 18:07:46,678 INFO L226 Difference]: Without dead ends: 178 [2019-01-18 18:07:46,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7612, Invalid=9418, Unknown=0, NotChecked=0, Total=17030 [2019-01-18 18:07:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-01-18 18:07:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2019-01-18 18:07:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-01-18 18:07:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2019-01-18 18:07:46,685 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 172 [2019-01-18 18:07:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:46,685 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2019-01-18 18:07:46,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-01-18 18:07:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2019-01-18 18:07:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-01-18 18:07:46,686 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:46,687 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1] [2019-01-18 18:07:46,687 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:46,687 INFO L82 PathProgramCache]: Analyzing trace with hash 572104825, now seen corresponding path program 43 times [2019-01-18 18:07:46,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:46,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:46,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:46,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:46,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:47,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:47,739 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:47,740 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:47,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:47,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:47,740 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 [2019-01-18 18:07:47,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:47,748 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:07:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:47,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:47,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-18 18:07:47,805 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:47,814 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:47,815 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:49,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:51,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:51,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 132 [2019-01-18 18:07:51,785 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:51,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-01-18 18:07:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-01-18 18:07:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-18 18:07:51,787 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 90 states. [2019-01-18 18:07:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:52,085 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2019-01-18 18:07:52,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-01-18 18:07:52,085 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 176 [2019-01-18 18:07:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:52,086 INFO L225 Difference]: With dead ends: 183 [2019-01-18 18:07:52,087 INFO L226 Difference]: Without dead ends: 182 [2019-01-18 18:07:52,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7656 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7965, Invalid=9857, Unknown=0, NotChecked=0, Total=17822 [2019-01-18 18:07:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-01-18 18:07:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-01-18 18:07:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-01-18 18:07:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2019-01-18 18:07:52,092 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 176 [2019-01-18 18:07:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:52,092 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2019-01-18 18:07:52,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-01-18 18:07:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2019-01-18 18:07:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-01-18 18:07:52,093 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:52,093 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1] [2019-01-18 18:07:52,093 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:52,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1124518962, now seen corresponding path program 44 times [2019-01-18 18:07:52,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:52,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:52,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:07:52,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:52,095 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:53,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:53,178 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:53,178 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:53,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:53,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:53,178 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 [2019-01-18 18:07:53,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:07:53,188 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:07:53,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-01-18 18:07:53,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:53,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:53,356 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 [2019-01-18 18:07:53,356 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:53,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:53,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:07:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:54,618 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:07:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:57,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:07:57,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 135 [2019-01-18 18:07:57,485 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:07:57,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-01-18 18:07:57,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-01-18 18:07:57,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-18 18:07:57,487 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 92 states. [2019-01-18 18:07:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:07:57,851 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2019-01-18 18:07:57,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-01-18 18:07:57,851 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 180 [2019-01-18 18:07:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:07:57,852 INFO L225 Difference]: With dead ends: 187 [2019-01-18 18:07:57,853 INFO L226 Difference]: Without dead ends: 186 [2019-01-18 18:07:57,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8010 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8326, Invalid=10306, Unknown=0, NotChecked=0, Total=18632 [2019-01-18 18:07:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-01-18 18:07:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2019-01-18 18:07:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-01-18 18:07:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2019-01-18 18:07:57,860 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 180 [2019-01-18 18:07:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:07:57,860 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2019-01-18 18:07:57,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-01-18 18:07:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2019-01-18 18:07:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-01-18 18:07:57,861 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:07:57,861 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1] [2019-01-18 18:07:57,862 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:07:57,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:07:57,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1919585429, now seen corresponding path program 45 times [2019-01-18 18:07:57,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:07:57,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:57,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:07:57,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:07:57,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:07:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:07:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:07:59,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:59,125 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:07:59,125 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:07:59,125 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:07:59,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:07:59,125 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 [2019-01-18 18:07:59,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:07:59,134 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:07:59,186 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:07:59,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:07:59,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:07:59,193 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 [2019-01-18 18:07:59,194 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:07:59,203 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:07:59,204 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:00,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:03,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:03,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 138 [2019-01-18 18:08:03,583 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:03,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-01-18 18:08:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-01-18 18:08:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-18 18:08:03,585 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 94 states. [2019-01-18 18:08:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:03,906 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2019-01-18 18:08:03,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-01-18 18:08:03,907 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 184 [2019-01-18 18:08:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:03,908 INFO L225 Difference]: With dead ends: 191 [2019-01-18 18:08:03,908 INFO L226 Difference]: Without dead ends: 190 [2019-01-18 18:08:03,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8695, Invalid=10765, Unknown=0, NotChecked=0, Total=19460 [2019-01-18 18:08:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-01-18 18:08:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2019-01-18 18:08:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-01-18 18:08:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2019-01-18 18:08:03,913 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 184 [2019-01-18 18:08:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:03,913 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2019-01-18 18:08:03,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-01-18 18:08:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2019-01-18 18:08:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-01-18 18:08:03,914 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:03,914 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1] [2019-01-18 18:08:03,914 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 362534436, now seen corresponding path program 46 times [2019-01-18 18:08:03,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:03,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:03,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:08:03,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:03,915 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:05,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:05,666 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:05,666 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:05,666 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:05,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:05,667 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 [2019-01-18 18:08:05,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:05,676 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:08:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:05,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:05,739 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 [2019-01-18 18:08:05,739 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:05,748 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:05,749 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:08,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:11,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:11,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 141 [2019-01-18 18:08:11,356 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:11,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-01-18 18:08:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-01-18 18:08:11,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-18 18:08:11,359 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 96 states. [2019-01-18 18:08:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:11,780 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2019-01-18 18:08:11,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-01-18 18:08:11,780 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 188 [2019-01-18 18:08:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:11,782 INFO L225 Difference]: With dead ends: 195 [2019-01-18 18:08:11,782 INFO L226 Difference]: Without dead ends: 194 [2019-01-18 18:08:11,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9072, Invalid=11234, Unknown=0, NotChecked=0, Total=20306 [2019-01-18 18:08:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-01-18 18:08:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2019-01-18 18:08:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-01-18 18:08:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2019-01-18 18:08:11,790 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 188 [2019-01-18 18:08:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:11,790 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2019-01-18 18:08:11,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-01-18 18:08:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2019-01-18 18:08:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-01-18 18:08:11,791 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:11,791 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1] [2019-01-18 18:08:11,791 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1714408355, now seen corresponding path program 47 times [2019-01-18 18:08:11,792 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:11,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:11,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:11,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:11,793 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:13,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:13,071 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:13,071 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:13,071 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:13,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:13,072 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 [2019-01-18 18:08:13,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:08:13,080 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:08:13,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-01-18 18:08:13,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:08:13,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:13,279 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 [2019-01-18 18:08:13,280 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:13,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:13,374 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:14,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:18,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:18,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 144 [2019-01-18 18:08:18,191 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:18,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-01-18 18:08:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-01-18 18:08:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-18 18:08:18,193 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 98 states. [2019-01-18 18:08:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:18,638 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2019-01-18 18:08:18,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-01-18 18:08:18,638 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 192 [2019-01-18 18:08:18,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:18,640 INFO L225 Difference]: With dead ends: 199 [2019-01-18 18:08:18,640 INFO L226 Difference]: Without dead ends: 198 [2019-01-18 18:08:18,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9457, Invalid=11713, Unknown=0, NotChecked=0, Total=21170 [2019-01-18 18:08:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-01-18 18:08:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2019-01-18 18:08:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-01-18 18:08:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2019-01-18 18:08:18,647 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 192 [2019-01-18 18:08:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:18,647 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2019-01-18 18:08:18,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-01-18 18:08:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2019-01-18 18:08:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-01-18 18:08:18,648 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:18,649 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1] [2019-01-18 18:08:18,649 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:18,649 INFO L82 PathProgramCache]: Analyzing trace with hash 331927062, now seen corresponding path program 48 times [2019-01-18 18:08:18,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:18,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:18,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:08:18,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:18,650 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:20,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:20,043 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:20,043 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:20,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:20,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:20,043 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 [2019-01-18 18:08:20,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:08:20,053 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:08:20,111 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:08:20,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:08:20,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:20,124 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 [2019-01-18 18:08:20,124 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:20,134 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:20,134 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:21,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:24,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:24,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 147 [2019-01-18 18:08:24,990 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:24,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-01-18 18:08:24,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-01-18 18:08:24,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-18 18:08:24,992 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 100 states. [2019-01-18 18:08:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:25,365 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2019-01-18 18:08:25,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-01-18 18:08:25,366 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 196 [2019-01-18 18:08:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:25,367 INFO L225 Difference]: With dead ends: 203 [2019-01-18 18:08:25,367 INFO L226 Difference]: Without dead ends: 202 [2019-01-18 18:08:25,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9506 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9850, Invalid=12202, Unknown=0, NotChecked=0, Total=22052 [2019-01-18 18:08:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-01-18 18:08:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2019-01-18 18:08:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-01-18 18:08:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2019-01-18 18:08:25,373 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 196 [2019-01-18 18:08:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:25,374 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2019-01-18 18:08:25,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-01-18 18:08:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2019-01-18 18:08:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-01-18 18:08:25,374 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:25,375 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1] [2019-01-18 18:08:25,375 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1207690063, now seen corresponding path program 49 times [2019-01-18 18:08:25,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:25,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:25,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:08:25,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:25,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:26,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:26,751 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:26,751 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:26,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:26,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:26,751 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 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 [2019-01-18 18:08:26,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:26,762 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:08:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:26,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:26,831 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 [2019-01-18 18:08:26,831 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:26,842 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:26,842 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:28,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:31,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:31,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 150 [2019-01-18 18:08:31,748 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:31,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-01-18 18:08:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-01-18 18:08:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-18 18:08:31,750 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 102 states. [2019-01-18 18:08:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:32,109 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2019-01-18 18:08:32,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-01-18 18:08:32,110 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 200 [2019-01-18 18:08:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:32,111 INFO L225 Difference]: With dead ends: 207 [2019-01-18 18:08:32,112 INFO L226 Difference]: Without dead ends: 206 [2019-01-18 18:08:32,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9900 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10251, Invalid=12701, Unknown=0, NotChecked=0, Total=22952 [2019-01-18 18:08:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-01-18 18:08:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2019-01-18 18:08:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-01-18 18:08:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2019-01-18 18:08:32,119 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 200 [2019-01-18 18:08:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:32,119 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2019-01-18 18:08:32,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-01-18 18:08:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2019-01-18 18:08:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-01-18 18:08:32,120 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:32,121 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1] [2019-01-18 18:08:32,121 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1438626824, now seen corresponding path program 50 times [2019-01-18 18:08:32,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:32,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:32,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:32,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:32,122 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:33,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:33,635 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:33,635 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:33,635 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:33,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:33,635 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 [2019-01-18 18:08:33,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:08:33,645 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:08:33,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-01-18 18:08:33,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:08:33,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:33,850 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 [2019-01-18 18:08:33,850 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:33,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:33,859 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:35,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:38,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:38,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2019-01-18 18:08:38,887 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:38,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-01-18 18:08:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-01-18 18:08:38,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-18 18:08:38,890 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 104 states. [2019-01-18 18:08:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:39,310 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2019-01-18 18:08:39,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-01-18 18:08:39,311 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 204 [2019-01-18 18:08:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:39,313 INFO L225 Difference]: With dead ends: 211 [2019-01-18 18:08:39,313 INFO L226 Difference]: Without dead ends: 210 [2019-01-18 18:08:39,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10397 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10353, Invalid=12903, Unknown=0, NotChecked=0, Total=23256 [2019-01-18 18:08:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-01-18 18:08:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2019-01-18 18:08:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-01-18 18:08:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2019-01-18 18:08:39,319 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 204 [2019-01-18 18:08:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:39,320 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2019-01-18 18:08:39,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-01-18 18:08:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2019-01-18 18:08:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-01-18 18:08:39,321 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:39,321 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1] [2019-01-18 18:08:39,321 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:39,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1196064833, now seen corresponding path program 51 times [2019-01-18 18:08:39,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:39,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:39,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:08:39,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:39,323 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:41,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:41,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:41,837 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:41,837 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:41,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:41,837 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 [2019-01-18 18:08:41,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:08:41,845 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:08:41,919 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:08:41,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:08:41,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:41,942 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 [2019-01-18 18:08:41,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:42,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:42,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:44,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:48,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:48,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 152 [2019-01-18 18:08:48,416 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:48,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-01-18 18:08:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-01-18 18:08:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-18 18:08:48,418 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 106 states. [2019-01-18 18:08:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:48,868 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2019-01-18 18:08:48,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-01-18 18:08:48,868 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 208 [2019-01-18 18:08:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:48,870 INFO L225 Difference]: With dead ends: 215 [2019-01-18 18:08:48,870 INFO L226 Difference]: Without dead ends: 214 [2019-01-18 18:08:48,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 310 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=10455, Invalid=13107, Unknown=0, NotChecked=0, Total=23562 [2019-01-18 18:08:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-01-18 18:08:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2019-01-18 18:08:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-01-18 18:08:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2019-01-18 18:08:48,877 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 208 [2019-01-18 18:08:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:48,877 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2019-01-18 18:08:48,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-01-18 18:08:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2019-01-18 18:08:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-01-18 18:08:48,878 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:48,879 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1] [2019-01-18 18:08:48,879 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1582135302, now seen corresponding path program 52 times [2019-01-18 18:08:48,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:48,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:48,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:08:48,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:48,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:50,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:50,324 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:50,324 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:50,324 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:50,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:50,324 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 [2019-01-18 18:08:50,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:50,332 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:08:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:50,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:50,412 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 [2019-01-18 18:08:50,413 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:50,456 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:50,457 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:52,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:08:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:55,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:08:55,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2019-01-18 18:08:55,751 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:08:55,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-01-18 18:08:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-01-18 18:08:55,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-18 18:08:55,753 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 108 states. [2019-01-18 18:08:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:08:56,139 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2019-01-18 18:08:56,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-01-18 18:08:56,139 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 212 [2019-01-18 18:08:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:08:56,141 INFO L225 Difference]: With dead ends: 219 [2019-01-18 18:08:56,141 INFO L226 Difference]: Without dead ends: 218 [2019-01-18 18:08:56,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 316 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11391 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10557, Invalid=13313, Unknown=0, NotChecked=0, Total=23870 [2019-01-18 18:08:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-01-18 18:08:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-01-18 18:08:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-01-18 18:08:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2019-01-18 18:08:56,146 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 212 [2019-01-18 18:08:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:08:56,147 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2019-01-18 18:08:56,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-01-18 18:08:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2019-01-18 18:08:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-01-18 18:08:56,148 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:08:56,148 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1] [2019-01-18 18:08:56,148 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:08:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:08:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash -185726157, now seen corresponding path program 53 times [2019-01-18 18:08:56,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:08:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:56,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:08:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:08:56,149 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:08:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:08:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:57,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:57,647 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:08:57,647 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:08:57,647 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:08:57,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:08:57,647 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 [2019-01-18 18:08:57,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:08:57,657 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:08:57,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-01-18 18:08:57,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:08:57,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:08:57,889 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 [2019-01-18 18:08:57,889 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:08:57,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:08:57,900 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:08:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:08:59,777 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:03,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:03,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 154 [2019-01-18 18:09:03,444 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:03,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-01-18 18:09:03,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-01-18 18:09:03,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-18 18:09:03,445 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 110 states. [2019-01-18 18:09:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:03,854 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2019-01-18 18:09:03,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-01-18 18:09:03,855 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 216 [2019-01-18 18:09:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:03,857 INFO L225 Difference]: With dead ends: 223 [2019-01-18 18:09:03,857 INFO L226 Difference]: Without dead ends: 222 [2019-01-18 18:09:03,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 322 SyntacticMatches, 8 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11888 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10659, Invalid=13521, Unknown=0, NotChecked=0, Total=24180 [2019-01-18 18:09:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-01-18 18:09:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2019-01-18 18:09:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-18 18:09:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2019-01-18 18:09:03,862 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 216 [2019-01-18 18:09:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:03,862 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2019-01-18 18:09:03,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-01-18 18:09:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2019-01-18 18:09:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-01-18 18:09:03,863 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:03,864 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1] [2019-01-18 18:09:03,864 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1809009132, now seen corresponding path program 54 times [2019-01-18 18:09:03,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:03,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:03,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:09:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:03,865 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:05,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:05,434 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:05,434 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:05,434 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:05,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:05,434 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 [2019-01-18 18:09:05,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:09:05,444 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:09:05,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:09:05,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:09:05,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:05,522 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 [2019-01-18 18:09:05,522 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:05,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:05,532 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:09:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:07,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:11,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:11,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 155 [2019-01-18 18:09:11,010 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:11,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-01-18 18:09:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-01-18 18:09:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-01-18 18:09:11,012 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 112 states. [2019-01-18 18:09:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:11,514 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2019-01-18 18:09:11,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-01-18 18:09:11,514 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 220 [2019-01-18 18:09:11,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:11,516 INFO L225 Difference]: With dead ends: 227 [2019-01-18 18:09:11,516 INFO L226 Difference]: Without dead ends: 226 [2019-01-18 18:09:11,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 328 SyntacticMatches, 10 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12385 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10761, Invalid=13731, Unknown=0, NotChecked=0, Total=24492 [2019-01-18 18:09:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-01-18 18:09:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2019-01-18 18:09:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-18 18:09:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2019-01-18 18:09:11,523 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 220 [2019-01-18 18:09:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:11,524 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2019-01-18 18:09:11,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-01-18 18:09:11,524 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2019-01-18 18:09:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-01-18 18:09:11,525 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:11,525 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1] [2019-01-18 18:09:11,525 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:11,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1545110565, now seen corresponding path program 55 times [2019-01-18 18:09:11,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:11,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:11,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:09:11,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:11,527 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:13,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:13,063 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:13,064 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:13,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:13,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:13,064 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 [2019-01-18 18:09:13,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:13,089 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:13,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:13,165 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 [2019-01-18 18:09:13,165 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:13,175 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:09:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:15,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:18,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:18,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 156 [2019-01-18 18:09:18,997 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:18,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-01-18 18:09:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-01-18 18:09:18,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-18 18:09:18,999 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 114 states. [2019-01-18 18:09:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:19,491 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2019-01-18 18:09:19,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-01-18 18:09:19,491 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 224 [2019-01-18 18:09:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:19,493 INFO L225 Difference]: With dead ends: 231 [2019-01-18 18:09:19,493 INFO L226 Difference]: Without dead ends: 230 [2019-01-18 18:09:19,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 334 SyntacticMatches, 12 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10863, Invalid=13943, Unknown=0, NotChecked=0, Total=24806 [2019-01-18 18:09:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-18 18:09:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2019-01-18 18:09:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-01-18 18:09:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2019-01-18 18:09:19,501 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 224 [2019-01-18 18:09:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:19,501 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2019-01-18 18:09:19,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-01-18 18:09:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2019-01-18 18:09:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-01-18 18:09:19,502 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:19,503 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1] [2019-01-18 18:09:19,503 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:19,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:19,503 INFO L82 PathProgramCache]: Analyzing trace with hash -699139618, now seen corresponding path program 56 times [2019-01-18 18:09:19,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:19,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:19,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:19,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:19,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:21,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:21,117 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:21,117 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:21,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:21,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:21,117 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 [2019-01-18 18:09:21,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:09:21,127 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:09:21,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-01-18 18:09:21,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:09:21,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:21,372 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 [2019-01-18 18:09:21,372 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,380 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:21,381 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:09:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:23,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:27,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:27,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 157 [2019-01-18 18:09:27,075 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:27,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-01-18 18:09:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-01-18 18:09:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-18 18:09:27,078 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 116 states. [2019-01-18 18:09:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:27,572 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2019-01-18 18:09:27,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-01-18 18:09:27,573 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 228 [2019-01-18 18:09:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:27,574 INFO L225 Difference]: With dead ends: 235 [2019-01-18 18:09:27,574 INFO L226 Difference]: Without dead ends: 234 [2019-01-18 18:09:27,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 340 SyntacticMatches, 14 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13379 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10965, Invalid=14157, Unknown=0, NotChecked=0, Total=25122 [2019-01-18 18:09:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-01-18 18:09:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2019-01-18 18:09:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-01-18 18:09:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2019-01-18 18:09:27,579 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 228 [2019-01-18 18:09:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:27,580 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2019-01-18 18:09:27,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-01-18 18:09:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2019-01-18 18:09:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-01-18 18:09:27,581 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:27,581 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1] [2019-01-18 18:09:27,581 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:27,582 INFO L82 PathProgramCache]: Analyzing trace with hash 905702167, now seen corresponding path program 57 times [2019-01-18 18:09:27,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:27,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:27,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:09:27,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:27,583 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:29,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:29,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:29,420 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:29,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:29,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:29,421 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 [2019-01-18 18:09:29,430 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:09:29,430 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:09:29,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:09:29,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:09:29,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:29,513 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 [2019-01-18 18:09:29,513 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,521 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:29,521 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:09:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:31,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:35,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:35,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 158 [2019-01-18 18:09:35,544 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:35,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-01-18 18:09:35,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-01-18 18:09:35,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-18 18:09:35,546 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 118 states. [2019-01-18 18:09:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:36,027 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2019-01-18 18:09:36,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-01-18 18:09:36,028 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 232 [2019-01-18 18:09:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:36,030 INFO L225 Difference]: With dead ends: 239 [2019-01-18 18:09:36,030 INFO L226 Difference]: Without dead ends: 238 [2019-01-18 18:09:36,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 346 SyntacticMatches, 16 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13876 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=11067, Invalid=14373, Unknown=0, NotChecked=0, Total=25440 [2019-01-18 18:09:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-01-18 18:09:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2019-01-18 18:09:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-01-18 18:09:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2019-01-18 18:09:36,037 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 232 [2019-01-18 18:09:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:36,038 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2019-01-18 18:09:36,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-01-18 18:09:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2019-01-18 18:09:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-01-18 18:09:36,039 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:36,039 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1] [2019-01-18 18:09:36,039 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:36,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1318676528, now seen corresponding path program 58 times [2019-01-18 18:09:36,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:36,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:36,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:09:36,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:36,041 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:37,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:37,985 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:37,985 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:37,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:37,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:37,985 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 [2019-01-18 18:09:37,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:37,997 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:09:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:38,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:38,072 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 [2019-01-18 18:09:38,072 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:38,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:38,083 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:09:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:40,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:44,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:44,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 159 [2019-01-18 18:09:44,362 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:44,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2019-01-18 18:09:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2019-01-18 18:09:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-18 18:09:44,364 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 120 states. [2019-01-18 18:09:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:44,854 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2019-01-18 18:09:44,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-01-18 18:09:44,854 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 236 [2019-01-18 18:09:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:44,855 INFO L225 Difference]: With dead ends: 243 [2019-01-18 18:09:44,855 INFO L226 Difference]: Without dead ends: 242 [2019-01-18 18:09:44,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 352 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14373 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=11169, Invalid=14591, Unknown=0, NotChecked=0, Total=25760 [2019-01-18 18:09:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-01-18 18:09:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2019-01-18 18:09:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-01-18 18:09:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2019-01-18 18:09:44,860 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 236 [2019-01-18 18:09:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:44,860 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2019-01-18 18:09:44,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2019-01-18 18:09:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2019-01-18 18:09:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-01-18 18:09:44,861 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:44,861 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1] [2019-01-18 18:09:44,862 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:44,862 INFO L82 PathProgramCache]: Analyzing trace with hash -372621303, now seen corresponding path program 59 times [2019-01-18 18:09:44,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:44,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:44,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:09:44,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:44,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:46,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:46,611 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:46,611 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:46,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:46,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:46,611 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 [2019-01-18 18:09:46,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:09:46,622 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:09:46,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-01-18 18:09:46,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:09:46,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:46,896 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 [2019-01-18 18:09:46,896 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:46,905 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:46,905 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:09:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:49,098 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:09:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:52,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:09:52,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 160 [2019-01-18 18:09:52,958 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:09:52,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2019-01-18 18:09:52,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2019-01-18 18:09:52,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-18 18:09:52,960 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 122 states. [2019-01-18 18:09:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:09:53,462 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2019-01-18 18:09:53,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-01-18 18:09:53,463 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 240 [2019-01-18 18:09:53,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:09:53,464 INFO L225 Difference]: With dead ends: 247 [2019-01-18 18:09:53,465 INFO L226 Difference]: Without dead ends: 246 [2019-01-18 18:09:53,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 358 SyntacticMatches, 20 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14870 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11271, Invalid=14811, Unknown=0, NotChecked=0, Total=26082 [2019-01-18 18:09:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-01-18 18:09:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2019-01-18 18:09:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-01-18 18:09:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2019-01-18 18:09:53,472 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 240 [2019-01-18 18:09:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:09:53,472 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2019-01-18 18:09:53,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2019-01-18 18:09:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2019-01-18 18:09:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-01-18 18:09:53,474 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:09:53,474 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1] [2019-01-18 18:09:53,474 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:09:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:09:53,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2067604418, now seen corresponding path program 60 times [2019-01-18 18:09:53,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:09:53,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:53,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:09:53,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:09:53,476 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:09:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:09:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:55,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:55,609 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:09:55,610 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:09:55,610 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:09:55,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:09:55,610 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 [2019-01-18 18:09:55,618 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:09:55,618 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:09:55,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:09:55,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:09:55,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:09:55,704 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 [2019-01-18 18:09:55,704 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:09:55,714 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:09:55,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:09:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:09:57,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:01,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:01,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 161 [2019-01-18 18:10:01,972 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:01,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-01-18 18:10:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-01-18 18:10:01,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-18 18:10:01,974 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 124 states. [2019-01-18 18:10:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:02,473 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2019-01-18 18:10:02,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-01-18 18:10:02,474 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 244 [2019-01-18 18:10:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:02,475 INFO L225 Difference]: With dead ends: 251 [2019-01-18 18:10:02,475 INFO L226 Difference]: Without dead ends: 250 [2019-01-18 18:10:02,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 364 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15367 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11373, Invalid=15033, Unknown=0, NotChecked=0, Total=26406 [2019-01-18 18:10:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-01-18 18:10:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2019-01-18 18:10:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-01-18 18:10:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2019-01-18 18:10:02,482 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 244 [2019-01-18 18:10:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:02,482 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2019-01-18 18:10:02,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-01-18 18:10:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2019-01-18 18:10:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-01-18 18:10:02,484 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:02,484 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1] [2019-01-18 18:10:02,484 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:02,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1934261509, now seen corresponding path program 61 times [2019-01-18 18:10:02,485 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:02,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:02,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:02,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:02,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:04,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:04,383 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:04,383 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:04,384 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:04,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:04,384 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 [2019-01-18 18:10:04,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:04,392 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:04,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:04,473 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 [2019-01-18 18:10:04,473 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:04,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:04,482 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:10:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:06,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:10,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:10,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 162 [2019-01-18 18:10:10,644 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:10,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-01-18 18:10:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-01-18 18:10:10,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-18 18:10:10,646 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 126 states. [2019-01-18 18:10:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:11,131 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2019-01-18 18:10:11,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-01-18 18:10:11,132 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 248 [2019-01-18 18:10:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:11,133 INFO L225 Difference]: With dead ends: 255 [2019-01-18 18:10:11,133 INFO L226 Difference]: Without dead ends: 254 [2019-01-18 18:10:11,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 370 SyntacticMatches, 24 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15864 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11475, Invalid=15257, Unknown=0, NotChecked=0, Total=26732 [2019-01-18 18:10:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-01-18 18:10:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2019-01-18 18:10:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2019-01-18 18:10:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2019-01-18 18:10:11,138 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 248 [2019-01-18 18:10:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:11,139 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2019-01-18 18:10:11,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-01-18 18:10:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2019-01-18 18:10:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-01-18 18:10:11,139 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:11,140 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1] [2019-01-18 18:10:11,140 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:11,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1611242932, now seen corresponding path program 62 times [2019-01-18 18:10:11,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:11,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:11,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:11,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:11,141 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:13,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:13,032 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:13,032 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:13,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:13,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:13,032 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 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 [2019-01-18 18:10:13,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:10:13,044 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:10:13,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2019-01-18 18:10:13,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:13,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:13,346 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 [2019-01-18 18:10:13,346 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,355 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:13,355 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:10:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:15,737 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:19,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:19,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 163 [2019-01-18 18:10:19,277 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:19,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2019-01-18 18:10:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2019-01-18 18:10:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-18 18:10:19,279 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 128 states. [2019-01-18 18:10:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:19,772 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2019-01-18 18:10:19,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-01-18 18:10:19,773 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 252 [2019-01-18 18:10:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:19,774 INFO L225 Difference]: With dead ends: 259 [2019-01-18 18:10:19,774 INFO L226 Difference]: Without dead ends: 258 [2019-01-18 18:10:19,776 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 376 SyntacticMatches, 26 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16361 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11577, Invalid=15483, Unknown=0, NotChecked=0, Total=27060 [2019-01-18 18:10:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-01-18 18:10:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2019-01-18 18:10:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2019-01-18 18:10:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2019-01-18 18:10:19,780 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 252 [2019-01-18 18:10:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:19,781 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2019-01-18 18:10:19,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2019-01-18 18:10:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2019-01-18 18:10:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-01-18 18:10:19,782 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:19,782 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1] [2019-01-18 18:10:19,782 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:19,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:19,782 INFO L82 PathProgramCache]: Analyzing trace with hash -504384531, now seen corresponding path program 63 times [2019-01-18 18:10:19,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:19,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:19,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:19,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:19,783 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:21,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:21,842 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:21,842 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:21,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:21,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:21,842 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 [2019-01-18 18:10:21,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:10:21,854 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:10:21,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:10:21,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:21,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:21,939 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 [2019-01-18 18:10:21,939 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:21,950 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:21,951 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:10:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:24,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:28,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:28,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 164 [2019-01-18 18:10:28,128 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:28,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-01-18 18:10:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-01-18 18:10:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-18 18:10:28,131 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 130 states. [2019-01-18 18:10:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:28,617 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2019-01-18 18:10:28,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-01-18 18:10:28,618 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 256 [2019-01-18 18:10:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:28,619 INFO L225 Difference]: With dead ends: 263 [2019-01-18 18:10:28,619 INFO L226 Difference]: Without dead ends: 262 [2019-01-18 18:10:28,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 382 SyntacticMatches, 28 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16858 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11679, Invalid=15711, Unknown=0, NotChecked=0, Total=27390 [2019-01-18 18:10:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-01-18 18:10:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2019-01-18 18:10:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2019-01-18 18:10:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2019-01-18 18:10:28,626 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 256 [2019-01-18 18:10:28,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:28,627 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2019-01-18 18:10:28,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-01-18 18:10:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2019-01-18 18:10:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-01-18 18:10:28,628 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:28,628 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1] [2019-01-18 18:10:28,629 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash 972948902, now seen corresponding path program 64 times [2019-01-18 18:10:28,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:28,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:28,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:28,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:28,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:30,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:30,744 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:30,744 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:30,744 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:30,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:30,744 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 [2019-01-18 18:10:30,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:30,753 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:30,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:30,836 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 [2019-01-18 18:10:30,836 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:30,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:30,848 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:10:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:33,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:36,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:36,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 165 [2019-01-18 18:10:36,804 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:36,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-01-18 18:10:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-01-18 18:10:36,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-18 18:10:36,806 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 132 states. [2019-01-18 18:10:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:37,291 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2019-01-18 18:10:37,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-01-18 18:10:37,291 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 260 [2019-01-18 18:10:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:37,292 INFO L225 Difference]: With dead ends: 267 [2019-01-18 18:10:37,292 INFO L226 Difference]: Without dead ends: 266 [2019-01-18 18:10:37,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 388 SyntacticMatches, 30 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17355 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11781, Invalid=15941, Unknown=0, NotChecked=0, Total=27722 [2019-01-18 18:10:37,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-01-18 18:10:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2019-01-18 18:10:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2019-01-18 18:10:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2019-01-18 18:10:37,298 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 260 [2019-01-18 18:10:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:37,299 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2019-01-18 18:10:37,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-01-18 18:10:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2019-01-18 18:10:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-01-18 18:10:37,300 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:37,300 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1] [2019-01-18 18:10:37,300 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1521144543, now seen corresponding path program 65 times [2019-01-18 18:10:37,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:37,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:37,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:37,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:37,302 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:39,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:39,337 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:39,337 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:39,337 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:39,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:39,337 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 [2019-01-18 18:10:39,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:10:39,346 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:10:39,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2019-01-18 18:10:39,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:39,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:39,695 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 [2019-01-18 18:10:39,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:39,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:39,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:10:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:42,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:46,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:46,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 166 [2019-01-18 18:10:46,100 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:46,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2019-01-18 18:10:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2019-01-18 18:10:46,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-18 18:10:46,103 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 134 states. [2019-01-18 18:10:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:46,678 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2019-01-18 18:10:46,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-01-18 18:10:46,678 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 264 [2019-01-18 18:10:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:46,680 INFO L225 Difference]: With dead ends: 271 [2019-01-18 18:10:46,680 INFO L226 Difference]: Without dead ends: 270 [2019-01-18 18:10:46,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 394 SyntacticMatches, 32 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17852 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11883, Invalid=16173, Unknown=0, NotChecked=0, Total=28056 [2019-01-18 18:10:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-01-18 18:10:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2019-01-18 18:10:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2019-01-18 18:10:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2019-01-18 18:10:46,686 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 264 [2019-01-18 18:10:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:46,687 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2019-01-18 18:10:46,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2019-01-18 18:10:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2019-01-18 18:10:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-01-18 18:10:46,688 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:46,688 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1] [2019-01-18 18:10:46,688 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:46,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266792, now seen corresponding path program 66 times [2019-01-18 18:10:46,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:46,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:46,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:46,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:46,689 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:48,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:48,740 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:48,740 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:48,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:48,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:48,740 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 [2019-01-18 18:10:48,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:10:48,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:10:48,829 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:10:48,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:10:48,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:48,838 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 [2019-01-18 18:10:48,838 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,847 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:48,847 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:10:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:51,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:10:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:55,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:10:55,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 167 [2019-01-18 18:10:55,128 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:10:55,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-01-18 18:10:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-01-18 18:10:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-18 18:10:55,130 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 136 states. [2019-01-18 18:10:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:10:55,685 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2019-01-18 18:10:55,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-01-18 18:10:55,685 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 268 [2019-01-18 18:10:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:10:55,687 INFO L225 Difference]: With dead ends: 275 [2019-01-18 18:10:55,687 INFO L226 Difference]: Without dead ends: 274 [2019-01-18 18:10:55,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 400 SyntacticMatches, 34 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18349 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=11985, Invalid=16407, Unknown=0, NotChecked=0, Total=28392 [2019-01-18 18:10:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-01-18 18:10:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2019-01-18 18:10:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2019-01-18 18:10:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2019-01-18 18:10:55,693 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 268 [2019-01-18 18:10:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:10:55,693 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2019-01-18 18:10:55,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-01-18 18:10:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2019-01-18 18:10:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-01-18 18:10:55,694 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:10:55,695 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1] [2019-01-18 18:10:55,695 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:10:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:10:55,695 INFO L82 PathProgramCache]: Analyzing trace with hash 370728913, now seen corresponding path program 67 times [2019-01-18 18:10:55,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:10:55,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:55,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:10:55,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:10:55,696 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:10:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:10:57,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:57,896 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:10:57,896 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:10:57,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:10:57,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:10:57,897 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:10:57,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:10:57,904 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:10:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:10:57,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:10:57,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-18 18:10:57,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,000 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:10:58,000 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:11:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:00,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:04,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:04,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 168 [2019-01-18 18:11:04,390 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:04,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-01-18 18:11:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-01-18 18:11:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-18 18:11:04,392 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 138 states. [2019-01-18 18:11:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:05,005 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2019-01-18 18:11:05,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-01-18 18:11:05,005 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 272 [2019-01-18 18:11:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:05,006 INFO L225 Difference]: With dead ends: 279 [2019-01-18 18:11:05,006 INFO L226 Difference]: Without dead ends: 278 [2019-01-18 18:11:05,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 406 SyntacticMatches, 36 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18846 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=12087, Invalid=16643, Unknown=0, NotChecked=0, Total=28730 [2019-01-18 18:11:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-01-18 18:11:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2019-01-18 18:11:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-01-18 18:11:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2019-01-18 18:11:05,014 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 272 [2019-01-18 18:11:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:05,014 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2019-01-18 18:11:05,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2019-01-18 18:11:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2019-01-18 18:11:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-01-18 18:11:05,015 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:05,016 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1] [2019-01-18 18:11:05,016 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:05,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1675190390, now seen corresponding path program 68 times [2019-01-18 18:11:05,016 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:05,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:05,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:05,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:05,017 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:07,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:07,248 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:07,248 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:07,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:07,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:07,248 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 [2019-01-18 18:11:07,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:11:07,256 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:11:07,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2019-01-18 18:11:07,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:11:07,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:07,595 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 [2019-01-18 18:11:07,596 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:07,609 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:07,609 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:11:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:10,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:14,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:14,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 169 [2019-01-18 18:11:14,226 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:14,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2019-01-18 18:11:14,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2019-01-18 18:11:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-18 18:11:14,228 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 140 states. [2019-01-18 18:11:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:14,717 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2019-01-18 18:11:14,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-01-18 18:11:14,718 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 276 [2019-01-18 18:11:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:14,720 INFO L225 Difference]: With dead ends: 283 [2019-01-18 18:11:14,720 INFO L226 Difference]: Without dead ends: 282 [2019-01-18 18:11:14,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 412 SyntacticMatches, 38 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19343 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=12189, Invalid=16881, Unknown=0, NotChecked=0, Total=29070 [2019-01-18 18:11:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-01-18 18:11:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2019-01-18 18:11:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2019-01-18 18:11:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2019-01-18 18:11:14,727 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 276 [2019-01-18 18:11:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:14,727 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2019-01-18 18:11:14,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2019-01-18 18:11:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2019-01-18 18:11:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-01-18 18:11:14,729 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:14,729 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1] [2019-01-18 18:11:14,729 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:14,729 INFO L82 PathProgramCache]: Analyzing trace with hash -513025341, now seen corresponding path program 69 times [2019-01-18 18:11:14,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:14,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:14,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:11:14,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:14,730 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:17,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:17,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:17,054 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:17,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:17,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:17,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:11:17,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:11:17,061 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:11:17,142 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:11:17,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:11:17,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:17,153 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 [2019-01-18 18:11:17,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:17,162 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:17,162 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:11:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:19,906 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:23,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:23,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2019-01-18 18:11:23,680 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:23,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-01-18 18:11:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-01-18 18:11:23,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-18 18:11:23,683 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 142 states. [2019-01-18 18:11:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:24,232 INFO L93 Difference]: Finished difference Result 287 states and 287 transitions. [2019-01-18 18:11:24,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-01-18 18:11:24,233 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 280 [2019-01-18 18:11:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:24,234 INFO L225 Difference]: With dead ends: 287 [2019-01-18 18:11:24,235 INFO L226 Difference]: Without dead ends: 286 [2019-01-18 18:11:24,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 418 SyntacticMatches, 40 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19840 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=12291, Invalid=17121, Unknown=0, NotChecked=0, Total=29412 [2019-01-18 18:11:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-01-18 18:11:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2019-01-18 18:11:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-01-18 18:11:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2019-01-18 18:11:24,240 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 280 [2019-01-18 18:11:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:24,240 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2019-01-18 18:11:24,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2019-01-18 18:11:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2019-01-18 18:11:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-01-18 18:11:24,241 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:24,242 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1] [2019-01-18 18:11:24,242 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1052692860, now seen corresponding path program 70 times [2019-01-18 18:11:24,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:24,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:24,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:11:24,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:24,243 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:26,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:26,690 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:26,690 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:26,690 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:26,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:26,690 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 [2019-01-18 18:11:26,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:26,700 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:26,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:26,781 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 [2019-01-18 18:11:26,781 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,794 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:26,794 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:11:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:29,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:33,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:33,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 171 [2019-01-18 18:11:33,491 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:33,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2019-01-18 18:11:33,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2019-01-18 18:11:33,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-18 18:11:33,494 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand 144 states. [2019-01-18 18:11:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:34,091 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2019-01-18 18:11:34,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-01-18 18:11:34,091 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 284 [2019-01-18 18:11:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:34,093 INFO L225 Difference]: With dead ends: 291 [2019-01-18 18:11:34,093 INFO L226 Difference]: Without dead ends: 290 [2019-01-18 18:11:34,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 424 SyntacticMatches, 42 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20337 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=12393, Invalid=17363, Unknown=0, NotChecked=0, Total=29756 [2019-01-18 18:11:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-01-18 18:11:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2019-01-18 18:11:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2019-01-18 18:11:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2019-01-18 18:11:34,099 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 284 [2019-01-18 18:11:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:34,099 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2019-01-18 18:11:34,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2019-01-18 18:11:34,100 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2019-01-18 18:11:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-01-18 18:11:34,100 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:34,101 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1] [2019-01-18 18:11:34,101 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash 936756149, now seen corresponding path program 71 times [2019-01-18 18:11:34,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:34,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:34,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:34,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:34,102 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:36,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:36,567 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:36,567 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:36,567 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:36,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:36,567 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 [2019-01-18 18:11:36,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:11:36,575 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:11:36,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2019-01-18 18:11:36,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:11:36,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:36,949 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 [2019-01-18 18:11:36,949 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,960 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:36,960 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:11:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:39,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:43,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:43,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 172 [2019-01-18 18:11:43,576 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:43,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-01-18 18:11:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-01-18 18:11:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-01-18 18:11:43,579 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 146 states. [2019-01-18 18:11:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:44,167 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2019-01-18 18:11:44,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-01-18 18:11:44,167 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 288 [2019-01-18 18:11:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:44,169 INFO L225 Difference]: With dead ends: 295 [2019-01-18 18:11:44,169 INFO L226 Difference]: Without dead ends: 294 [2019-01-18 18:11:44,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 430 SyntacticMatches, 44 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20834 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=12495, Invalid=17607, Unknown=0, NotChecked=0, Total=30102 [2019-01-18 18:11:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-01-18 18:11:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2019-01-18 18:11:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2019-01-18 18:11:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2019-01-18 18:11:44,174 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 288 [2019-01-18 18:11:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:44,175 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2019-01-18 18:11:44,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2019-01-18 18:11:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2019-01-18 18:11:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-01-18 18:11:44,176 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:44,176 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1] [2019-01-18 18:11:44,176 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash 189198702, now seen corresponding path program 72 times [2019-01-18 18:11:44,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:44,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:44,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:11:44,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:44,178 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:46,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:46,682 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:46,682 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:46,682 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:46,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:46,682 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 [2019-01-18 18:11:46,690 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:11:46,691 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:11:46,788 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:11:46,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:11:46,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:46,814 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 [2019-01-18 18:11:46,815 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:46,818 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:46,819 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:11:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:49,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:11:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:53,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:11:53,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 173 [2019-01-18 18:11:53,686 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:11:53,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-01-18 18:11:53,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-01-18 18:11:53,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-18 18:11:53,688 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 148 states. [2019-01-18 18:11:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:11:54,344 INFO L93 Difference]: Finished difference Result 299 states and 299 transitions. [2019-01-18 18:11:54,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-01-18 18:11:54,345 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 292 [2019-01-18 18:11:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:11:54,347 INFO L225 Difference]: With dead ends: 299 [2019-01-18 18:11:54,347 INFO L226 Difference]: Without dead ends: 298 [2019-01-18 18:11:54,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 436 SyntacticMatches, 46 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21331 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12597, Invalid=17853, Unknown=0, NotChecked=0, Total=30450 [2019-01-18 18:11:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-01-18 18:11:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2019-01-18 18:11:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2019-01-18 18:11:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2019-01-18 18:11:54,352 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 292 [2019-01-18 18:11:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:11:54,353 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2019-01-18 18:11:54,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-01-18 18:11:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2019-01-18 18:11:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2019-01-18 18:11:54,354 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:11:54,354 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1] [2019-01-18 18:11:54,355 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:11:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:11:54,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1116248743, now seen corresponding path program 73 times [2019-01-18 18:11:54,355 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:11:54,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:54,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:11:54,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:11:54,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:11:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:11:57,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:57,022 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:11:57,022 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:11:57,022 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:11:57,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:11:57,022 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 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 [2019-01-18 18:11:57,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:11:57,030 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:11:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:11:57,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:11:57,115 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 [2019-01-18 18:11:57,115 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,124 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:11:57,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:12:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:00,178 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:04,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:04,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 174 [2019-01-18 18:12:04,013 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:04,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2019-01-18 18:12:04,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2019-01-18 18:12:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-18 18:12:04,016 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 150 states. [2019-01-18 18:12:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:04,564 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2019-01-18 18:12:04,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-01-18 18:12:04,564 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 296 [2019-01-18 18:12:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:04,566 INFO L225 Difference]: With dead ends: 303 [2019-01-18 18:12:04,566 INFO L226 Difference]: Without dead ends: 302 [2019-01-18 18:12:04,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 442 SyntacticMatches, 48 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21828 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=12699, Invalid=18101, Unknown=0, NotChecked=0, Total=30800 [2019-01-18 18:12:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-01-18 18:12:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2019-01-18 18:12:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-01-18 18:12:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2019-01-18 18:12:04,573 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 296 [2019-01-18 18:12:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:04,573 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2019-01-18 18:12:04,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2019-01-18 18:12:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2019-01-18 18:12:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2019-01-18 18:12:04,574 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:04,574 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1] [2019-01-18 18:12:04,574 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:04,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1106313056, now seen corresponding path program 74 times [2019-01-18 18:12:04,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:04,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:04,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:04,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:04,575 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:07,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:07,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:07,188 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:12:07,189 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:12:07,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:07,189 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 [2019-01-18 18:12:07,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:12:07,197 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:12:07,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2019-01-18 18:12:07,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:12:07,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:07,595 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 [2019-01-18 18:12:07,595 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:07,606 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:12:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:10,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:14,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:14,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 175 [2019-01-18 18:12:14,592 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:14,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2019-01-18 18:12:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2019-01-18 18:12:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-18 18:12:14,594 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 152 states. [2019-01-18 18:12:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:15,222 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2019-01-18 18:12:15,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-01-18 18:12:15,222 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 300 [2019-01-18 18:12:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:15,224 INFO L225 Difference]: With dead ends: 307 [2019-01-18 18:12:15,224 INFO L226 Difference]: Without dead ends: 306 [2019-01-18 18:12:15,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 448 SyntacticMatches, 50 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12801, Invalid=18351, Unknown=0, NotChecked=0, Total=31152 [2019-01-18 18:12:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-01-18 18:12:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2019-01-18 18:12:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-01-18 18:12:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2019-01-18 18:12:15,230 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 300 [2019-01-18 18:12:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:15,230 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2019-01-18 18:12:15,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2019-01-18 18:12:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2019-01-18 18:12:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-01-18 18:12:15,231 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:15,231 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1] [2019-01-18 18:12:15,231 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash -659136615, now seen corresponding path program 75 times [2019-01-18 18:12:15,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:15,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:15,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:12:15,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:15,232 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:17,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:17,931 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:17,931 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:12:17,931 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:12:17,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:17,932 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 [2019-01-18 18:12:17,940 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:12:17,940 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:12:18,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:12:18,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:12:18,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:18,044 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 [2019-01-18 18:12:18,044 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:18,052 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:18,052 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:12:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:21,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:25,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:25,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 176 [2019-01-18 18:12:25,132 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:25,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-01-18 18:12:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-01-18 18:12:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-18 18:12:25,134 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 154 states. [2019-01-18 18:12:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:25,728 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2019-01-18 18:12:25,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-01-18 18:12:25,728 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 304 [2019-01-18 18:12:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:25,730 INFO L225 Difference]: With dead ends: 311 [2019-01-18 18:12:25,730 INFO L226 Difference]: Without dead ends: 310 [2019-01-18 18:12:25,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 454 SyntacticMatches, 52 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22822 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=12903, Invalid=18603, Unknown=0, NotChecked=0, Total=31506 [2019-01-18 18:12:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2019-01-18 18:12:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2019-01-18 18:12:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2019-01-18 18:12:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2019-01-18 18:12:25,736 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 304 [2019-01-18 18:12:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:25,737 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2019-01-18 18:12:25,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-01-18 18:12:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2019-01-18 18:12:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2019-01-18 18:12:25,738 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:25,738 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1] [2019-01-18 18:12:25,738 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -789644462, now seen corresponding path program 76 times [2019-01-18 18:12:25,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:25,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:25,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:12:25,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:25,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:28,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:28,415 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:28,415 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:12:28,416 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:12:28,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:28,416 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 [2019-01-18 18:12:28,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:28,424 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:12:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:28,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:28,514 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 [2019-01-18 18:12:28,515 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:28,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:28,522 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:12:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:31,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:35,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:35,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 177 [2019-01-18 18:12:35,832 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:35,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2019-01-18 18:12:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2019-01-18 18:12:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-18 18:12:35,834 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand 156 states. [2019-01-18 18:12:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:36,467 INFO L93 Difference]: Finished difference Result 315 states and 315 transitions. [2019-01-18 18:12:36,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-01-18 18:12:36,467 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 308 [2019-01-18 18:12:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:36,468 INFO L225 Difference]: With dead ends: 315 [2019-01-18 18:12:36,469 INFO L226 Difference]: Without dead ends: 314 [2019-01-18 18:12:36,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 460 SyntacticMatches, 54 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23319 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=13005, Invalid=18857, Unknown=0, NotChecked=0, Total=31862 [2019-01-18 18:12:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-01-18 18:12:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2019-01-18 18:12:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-01-18 18:12:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2019-01-18 18:12:36,475 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 308 [2019-01-18 18:12:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:36,475 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2019-01-18 18:12:36,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2019-01-18 18:12:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2019-01-18 18:12:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-01-18 18:12:36,476 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:36,476 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1] [2019-01-18 18:12:36,476 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2140213899, now seen corresponding path program 77 times [2019-01-18 18:12:36,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:36,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:36,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:12:36,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:36,477 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:39,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:39,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:39,205 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:12:39,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:12:39,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:39,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:12:39,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:12:39,214 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:12:39,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2019-01-18 18:12:39,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:12:39,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:39,632 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 [2019-01-18 18:12:39,632 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:39,648 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:39,648 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:12:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:42,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:46,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:46,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 178 [2019-01-18 18:12:46,826 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:46,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2019-01-18 18:12:46,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2019-01-18 18:12:46,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-18 18:12:46,829 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 158 states. [2019-01-18 18:12:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:47,417 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2019-01-18 18:12:47,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-01-18 18:12:47,417 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 312 [2019-01-18 18:12:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:47,419 INFO L225 Difference]: With dead ends: 319 [2019-01-18 18:12:47,419 INFO L226 Difference]: Without dead ends: 318 [2019-01-18 18:12:47,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 466 SyntacticMatches, 56 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23816 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=13107, Invalid=19113, Unknown=0, NotChecked=0, Total=32220 [2019-01-18 18:12:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-01-18 18:12:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2019-01-18 18:12:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-01-18 18:12:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2019-01-18 18:12:47,425 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 312 [2019-01-18 18:12:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:47,425 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2019-01-18 18:12:47,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2019-01-18 18:12:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2019-01-18 18:12:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-01-18 18:12:47,427 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:47,427 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1] [2019-01-18 18:12:47,427 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1416815940, now seen corresponding path program 78 times [2019-01-18 18:12:47,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:47,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:47,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:12:47,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:47,429 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:12:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:50,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:50,235 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:12:50,235 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:12:50,235 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:12:50,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:12:50,235 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 [2019-01-18 18:12:50,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:12:50,244 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:12:50,334 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:12:50,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:12:50,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:12:50,348 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 [2019-01-18 18:12:50,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:12:50,356 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:12:50,356 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:12:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:53,766 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:12:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:12:57,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:12:57,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 179 [2019-01-18 18:12:57,626 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:12:57,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2019-01-18 18:12:57,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2019-01-18 18:12:57,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-18 18:12:57,629 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 160 states. [2019-01-18 18:12:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:12:58,289 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2019-01-18 18:12:58,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-01-18 18:12:58,289 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 316 [2019-01-18 18:12:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:12:58,291 INFO L225 Difference]: With dead ends: 323 [2019-01-18 18:12:58,291 INFO L226 Difference]: Without dead ends: 322 [2019-01-18 18:12:58,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 472 SyntacticMatches, 58 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24313 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13209, Invalid=19371, Unknown=0, NotChecked=0, Total=32580 [2019-01-18 18:12:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2019-01-18 18:12:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2019-01-18 18:12:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-01-18 18:12:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2019-01-18 18:12:58,297 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 316 [2019-01-18 18:12:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:12:58,298 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2019-01-18 18:12:58,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2019-01-18 18:12:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2019-01-18 18:12:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-01-18 18:12:58,299 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:12:58,299 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1] [2019-01-18 18:12:58,299 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:12:58,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:12:58,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1783280509, now seen corresponding path program 79 times [2019-01-18 18:12:58,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:12:58,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:58,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:12:58,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:12:58,300 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:12:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:01,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:01,169 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:13:01,169 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:13:01,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:13:01,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:01,169 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 [2019-01-18 18:13:01,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:13:01,177 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:13:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:01,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:13:01,268 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 [2019-01-18 18:13:01,268 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:13:01,276 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:13:01,277 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:13:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:04,739 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:13:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:08,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:13:08,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 180 [2019-01-18 18:13:08,724 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:13:08,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2019-01-18 18:13:08,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2019-01-18 18:13:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-18 18:13:08,726 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand 162 states. [2019-01-18 18:13:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:13:09,357 INFO L93 Difference]: Finished difference Result 327 states and 327 transitions. [2019-01-18 18:13:09,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-01-18 18:13:09,358 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 320 [2019-01-18 18:13:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:13:09,359 INFO L225 Difference]: With dead ends: 327 [2019-01-18 18:13:09,359 INFO L226 Difference]: Without dead ends: 326 [2019-01-18 18:13:09,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 478 SyntacticMatches, 60 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24810 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13311, Invalid=19631, Unknown=0, NotChecked=0, Total=32942 [2019-01-18 18:13:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-01-18 18:13:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2019-01-18 18:13:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2019-01-18 18:13:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2019-01-18 18:13:09,364 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 320 [2019-01-18 18:13:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:13:09,365 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2019-01-18 18:13:09,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2019-01-18 18:13:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2019-01-18 18:13:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-01-18 18:13:09,366 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:13:09,366 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1] [2019-01-18 18:13:09,366 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:13:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:13:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash 380550454, now seen corresponding path program 80 times [2019-01-18 18:13:09,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:13:09,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:09,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:13:09,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:09,367 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:13:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:12,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:12,544 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:13:12,544 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:13:12,544 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:13:12,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:12,544 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 [2019-01-18 18:13:12,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:13:12,552 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:13:13,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-01-18 18:13:13,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:13:13,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:13:13,023 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 [2019-01-18 18:13:13,023 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:13:13,034 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:13:13,034 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:13:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:16,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:13:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:20,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:13:20,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 181 [2019-01-18 18:13:20,665 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:13:20,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2019-01-18 18:13:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2019-01-18 18:13:20,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-01-18 18:13:20,668 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand 164 states. [2019-01-18 18:13:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:13:21,310 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2019-01-18 18:13:21,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-01-18 18:13:21,310 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 324 [2019-01-18 18:13:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:13:21,312 INFO L225 Difference]: With dead ends: 331 [2019-01-18 18:13:21,312 INFO L226 Difference]: Without dead ends: 330 [2019-01-18 18:13:21,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 484 SyntacticMatches, 62 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25307 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=13413, Invalid=19893, Unknown=0, NotChecked=0, Total=33306 [2019-01-18 18:13:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-01-18 18:13:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2019-01-18 18:13:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-01-18 18:13:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2019-01-18 18:13:21,319 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 324 [2019-01-18 18:13:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:13:21,319 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2019-01-18 18:13:21,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2019-01-18 18:13:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2019-01-18 18:13:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-01-18 18:13:21,321 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:13:21,321 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1] [2019-01-18 18:13:21,321 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:13:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:13:21,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2048213615, now seen corresponding path program 81 times [2019-01-18 18:13:21,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:13:21,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:21,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:13:21,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:21,322 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:13:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:24,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:24,614 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:13:24,614 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:13:24,614 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:13:24,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:24,614 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 [2019-01-18 18:13:24,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:13:24,623 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:13:24,720 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:13:24,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:13:24,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:13:24,731 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 [2019-01-18 18:13:24,731 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:13:24,741 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:13:24,741 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:13:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:28,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:13:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:32,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:13:32,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 182 [2019-01-18 18:13:32,302 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:13:32,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2019-01-18 18:13:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2019-01-18 18:13:32,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-18 18:13:32,305 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand 166 states. [2019-01-18 18:13:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:13:32,935 INFO L93 Difference]: Finished difference Result 335 states and 335 transitions. [2019-01-18 18:13:32,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-01-18 18:13:32,935 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 328 [2019-01-18 18:13:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:13:32,937 INFO L225 Difference]: With dead ends: 335 [2019-01-18 18:13:32,937 INFO L226 Difference]: Without dead ends: 334 [2019-01-18 18:13:32,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 490 SyntacticMatches, 64 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25804 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=13515, Invalid=20157, Unknown=0, NotChecked=0, Total=33672 [2019-01-18 18:13:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2019-01-18 18:13:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2019-01-18 18:13:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2019-01-18 18:13:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2019-01-18 18:13:32,943 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 328 [2019-01-18 18:13:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:13:32,944 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2019-01-18 18:13:32,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2019-01-18 18:13:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2019-01-18 18:13:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2019-01-18 18:13:32,945 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:13:32,945 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1] [2019-01-18 18:13:32,945 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:13:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:13:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash 265585448, now seen corresponding path program 82 times [2019-01-18 18:13:32,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:13:32,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:32,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:13:32,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:32,946 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:13:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:36,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:36,112 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:13:36,113 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:13:36,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:13:36,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:36,113 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 [2019-01-18 18:13:36,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:13:36,123 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:13:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:36,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:13:36,217 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 [2019-01-18 18:13:36,217 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:13:36,225 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:13:36,226 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:13:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:39,930 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:13:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:43,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:13:43,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 183 [2019-01-18 18:13:43,924 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:13:43,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2019-01-18 18:13:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2019-01-18 18:13:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-18 18:13:43,927 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 168 states. [2019-01-18 18:13:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:13:44,546 INFO L93 Difference]: Finished difference Result 339 states and 339 transitions. [2019-01-18 18:13:44,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-01-18 18:13:44,547 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 332 [2019-01-18 18:13:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:13:44,548 INFO L225 Difference]: With dead ends: 339 [2019-01-18 18:13:44,548 INFO L226 Difference]: Without dead ends: 338 [2019-01-18 18:13:44,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 496 SyntacticMatches, 66 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26301 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=13617, Invalid=20423, Unknown=0, NotChecked=0, Total=34040 [2019-01-18 18:13:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-01-18 18:13:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2019-01-18 18:13:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-01-18 18:13:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2019-01-18 18:13:44,554 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 332 [2019-01-18 18:13:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:13:44,554 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2019-01-18 18:13:44,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2019-01-18 18:13:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2019-01-18 18:13:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-01-18 18:13:44,555 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:13:44,556 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1] [2019-01-18 18:13:44,556 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:13:44,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:13:44,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1042464609, now seen corresponding path program 83 times [2019-01-18 18:13:44,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:13:44,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:44,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:13:44,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:44,557 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:13:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:47,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:47,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:13:47,704 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:13:47,704 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:13:47,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:47,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:13:47,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:13:47,713 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:13:48,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-01-18 18:13:48,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:13:48,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:13:48,202 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 [2019-01-18 18:13:48,202 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:13:48,212 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:13:48,212 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:13:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:52,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:13:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:56,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:13:56,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 184 [2019-01-18 18:13:56,065 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:13:56,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2019-01-18 18:13:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2019-01-18 18:13:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-18 18:13:56,068 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 170 states. [2019-01-18 18:13:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:13:56,766 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2019-01-18 18:13:56,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-01-18 18:13:56,766 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 336 [2019-01-18 18:13:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:13:56,768 INFO L225 Difference]: With dead ends: 343 [2019-01-18 18:13:56,768 INFO L226 Difference]: Without dead ends: 342 [2019-01-18 18:13:56,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 502 SyntacticMatches, 68 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26798 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=13719, Invalid=20691, Unknown=0, NotChecked=0, Total=34410 [2019-01-18 18:13:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-01-18 18:13:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2019-01-18 18:13:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-01-18 18:13:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2019-01-18 18:13:56,774 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 336 [2019-01-18 18:13:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:13:56,774 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2019-01-18 18:13:56,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2019-01-18 18:13:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2019-01-18 18:13:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-01-18 18:13:56,775 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:13:56,776 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1] [2019-01-18 18:13:56,776 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:13:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:13:56,776 INFO L82 PathProgramCache]: Analyzing trace with hash -434751718, now seen corresponding path program 84 times [2019-01-18 18:13:56,776 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:13:56,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:56,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:13:56,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:13:56,777 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:13:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:13:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:13:59,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:59,973 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:13:59,973 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:13:59,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:13:59,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:13:59,974 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 [2019-01-18 18:13:59,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:13:59,982 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:14:00,083 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:14:00,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:14:00,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:14:00,096 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 [2019-01-18 18:14:00,096 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:14:00,110 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:14:00,110 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:14:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:04,046 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:14:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:08,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:14:08,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 185 [2019-01-18 18:14:08,012 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:14:08,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2019-01-18 18:14:08,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2019-01-18 18:14:08,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-18 18:14:08,016 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand 172 states. [2019-01-18 18:14:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:14:08,744 INFO L93 Difference]: Finished difference Result 347 states and 347 transitions. [2019-01-18 18:14:08,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-01-18 18:14:08,745 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 340 [2019-01-18 18:14:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:14:08,747 INFO L225 Difference]: With dead ends: 347 [2019-01-18 18:14:08,747 INFO L226 Difference]: Without dead ends: 346 [2019-01-18 18:14:08,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 508 SyntacticMatches, 70 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27295 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=13821, Invalid=20961, Unknown=0, NotChecked=0, Total=34782 [2019-01-18 18:14:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2019-01-18 18:14:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2019-01-18 18:14:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2019-01-18 18:14:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2019-01-18 18:14:08,754 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 340 [2019-01-18 18:14:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:14:08,754 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2019-01-18 18:14:08,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2019-01-18 18:14:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2019-01-18 18:14:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-01-18 18:14:08,756 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:14:08,756 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1] [2019-01-18 18:14:08,756 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:14:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:14:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash -207279533, now seen corresponding path program 85 times [2019-01-18 18:14:08,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:14:08,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:08,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:14:08,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:08,757 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:14:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:14:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:12,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:12,031 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:14:12,032 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:14:12,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:14:12,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:12,032 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 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 [2019-01-18 18:14:12,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:14:12,040 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:14:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:14:12,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:14:12,135 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 [2019-01-18 18:14:12,136 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:14:12,148 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:14:12,148 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:14:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:16,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:14:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:20,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:14:20,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 186 [2019-01-18 18:14:20,286 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:14:20,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2019-01-18 18:14:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2019-01-18 18:14:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-18 18:14:20,289 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand 174 states. [2019-01-18 18:14:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:14:21,024 INFO L93 Difference]: Finished difference Result 351 states and 351 transitions. [2019-01-18 18:14:21,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-01-18 18:14:21,024 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 344 [2019-01-18 18:14:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:14:21,026 INFO L225 Difference]: With dead ends: 351 [2019-01-18 18:14:21,027 INFO L226 Difference]: Without dead ends: 350 [2019-01-18 18:14:21,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 514 SyntacticMatches, 72 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27792 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13923, Invalid=21233, Unknown=0, NotChecked=0, Total=35156 [2019-01-18 18:14:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-01-18 18:14:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2019-01-18 18:14:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2019-01-18 18:14:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2019-01-18 18:14:21,033 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 344 [2019-01-18 18:14:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:14:21,033 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2019-01-18 18:14:21,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2019-01-18 18:14:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2019-01-18 18:14:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-01-18 18:14:21,035 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:14:21,035 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1] [2019-01-18 18:14:21,035 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:14:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:14:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash -307898100, now seen corresponding path program 86 times [2019-01-18 18:14:21,035 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:14:21,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:21,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:14:21,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:21,036 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:14:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:14:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:24,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:24,381 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:14:24,382 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:14:24,382 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:14:24,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:24,382 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 [2019-01-18 18:14:24,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:14:24,391 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:14:24,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2019-01-18 18:14:24,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:14:24,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:14:24,906 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 [2019-01-18 18:14:24,907 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:14:24,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:14:24,916 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:14:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:28,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:14:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:32,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:14:32,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 187 [2019-01-18 18:14:32,989 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:14:32,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2019-01-18 18:14:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2019-01-18 18:14:32,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-18 18:14:32,993 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand 176 states. [2019-01-18 18:14:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:14:33,677 INFO L93 Difference]: Finished difference Result 355 states and 355 transitions. [2019-01-18 18:14:33,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-01-18 18:14:33,677 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 348 [2019-01-18 18:14:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:14:33,679 INFO L225 Difference]: With dead ends: 355 [2019-01-18 18:14:33,679 INFO L226 Difference]: Without dead ends: 354 [2019-01-18 18:14:33,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 520 SyntacticMatches, 74 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28289 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=14025, Invalid=21507, Unknown=0, NotChecked=0, Total=35532 [2019-01-18 18:14:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-01-18 18:14:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2019-01-18 18:14:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-01-18 18:14:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2019-01-18 18:14:33,686 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 348 [2019-01-18 18:14:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:14:33,686 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2019-01-18 18:14:33,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2019-01-18 18:14:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2019-01-18 18:14:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-01-18 18:14:33,687 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:14:33,687 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1] [2019-01-18 18:14:33,687 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:14:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:14:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2050063547, now seen corresponding path program 87 times [2019-01-18 18:14:33,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:14:33,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:33,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:14:33,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:33,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:14:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:14:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:37,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:37,115 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:14:37,115 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:14:37,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:14:37,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:37,115 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 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 [2019-01-18 18:14:37,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:14:37,125 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:14:37,232 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:14:37,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:14:37,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:14:37,247 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 [2019-01-18 18:14:37,247 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:14:37,255 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:14:37,255 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:14:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:41,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:14:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:45,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:14:45,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 188 [2019-01-18 18:14:45,405 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:14:45,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2019-01-18 18:14:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2019-01-18 18:14:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-18 18:14:45,408 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand 178 states. [2019-01-18 18:14:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:14:46,072 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2019-01-18 18:14:46,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-01-18 18:14:46,072 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 352 [2019-01-18 18:14:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:14:46,073 INFO L225 Difference]: With dead ends: 359 [2019-01-18 18:14:46,073 INFO L226 Difference]: Without dead ends: 358 [2019-01-18 18:14:46,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 526 SyntacticMatches, 76 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28786 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=14127, Invalid=21783, Unknown=0, NotChecked=0, Total=35910 [2019-01-18 18:14:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2019-01-18 18:14:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2019-01-18 18:14:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2019-01-18 18:14:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 357 transitions. [2019-01-18 18:14:46,079 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 357 transitions. Word has length 352 [2019-01-18 18:14:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:14:46,079 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 357 transitions. [2019-01-18 18:14:46,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2019-01-18 18:14:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 357 transitions. [2019-01-18 18:14:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2019-01-18 18:14:46,081 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:14:46,081 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1] [2019-01-18 18:14:46,081 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:14:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:14:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash 682977534, now seen corresponding path program 88 times [2019-01-18 18:14:46,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:14:46,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:46,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:14:46,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:46,082 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:14:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:14:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:49,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:49,582 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:14:49,583 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:14:49,583 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:14:49,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:14:49,583 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:14:49,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:14:49,609 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:14:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:14:49,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:14:49,706 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 [2019-01-18 18:14:49,706 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:14:49,714 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:14:49,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:14:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:53,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:14:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:14:58,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:14:58,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 189 [2019-01-18 18:14:58,033 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:14:58,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2019-01-18 18:14:58,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2019-01-18 18:14:58,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-18 18:14:58,036 INFO L87 Difference]: Start difference. First operand 357 states and 357 transitions. Second operand 180 states. [2019-01-18 18:14:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:14:58,806 INFO L93 Difference]: Finished difference Result 363 states and 363 transitions. [2019-01-18 18:14:58,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-01-18 18:14:58,807 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 356 [2019-01-18 18:14:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:14:58,809 INFO L225 Difference]: With dead ends: 363 [2019-01-18 18:14:58,809 INFO L226 Difference]: Without dead ends: 362 [2019-01-18 18:14:58,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 532 SyntacticMatches, 78 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29283 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=14229, Invalid=22061, Unknown=0, NotChecked=0, Total=36290 [2019-01-18 18:14:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-01-18 18:14:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2019-01-18 18:14:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2019-01-18 18:14:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 361 transitions. [2019-01-18 18:14:58,815 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 361 transitions. Word has length 356 [2019-01-18 18:14:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:14:58,815 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 361 transitions. [2019-01-18 18:14:58,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2019-01-18 18:14:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 361 transitions. [2019-01-18 18:14:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2019-01-18 18:14:58,816 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:14:58,817 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 1, 1] [2019-01-18 18:14:58,817 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:14:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:14:58,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1915696585, now seen corresponding path program 89 times [2019-01-18 18:14:58,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:14:58,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:58,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:14:58,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:14:58,818 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:14:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:15:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:02,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:02,404 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:15:02,404 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:15:02,404 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:15:02,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:02,404 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 [2019-01-18 18:15:02,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:15:02,412 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:15:02,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2019-01-18 18:15:02,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:15:02,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:15:02,963 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 [2019-01-18 18:15:02,963 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:15:02,974 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:15:02,974 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:15:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:07,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:15:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15931 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:11,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:15:11,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 190 [2019-01-18 18:15:11,353 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:15:11,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2019-01-18 18:15:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2019-01-18 18:15:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-18 18:15:11,356 INFO L87 Difference]: Start difference. First operand 361 states and 361 transitions. Second operand 182 states. [2019-01-18 18:15:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:15:12,057 INFO L93 Difference]: Finished difference Result 367 states and 367 transitions. [2019-01-18 18:15:12,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-01-18 18:15:12,057 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 360 [2019-01-18 18:15:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:15:12,060 INFO L225 Difference]: With dead ends: 367 [2019-01-18 18:15:12,060 INFO L226 Difference]: Without dead ends: 366 [2019-01-18 18:15:12,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 538 SyntacticMatches, 80 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29780 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=14331, Invalid=22341, Unknown=0, NotChecked=0, Total=36672 [2019-01-18 18:15:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-01-18 18:15:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2019-01-18 18:15:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2019-01-18 18:15:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 365 transitions. [2019-01-18 18:15:12,066 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 365 transitions. Word has length 360 [2019-01-18 18:15:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:15:12,066 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 365 transitions. [2019-01-18 18:15:12,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2019-01-18 18:15:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 365 transitions. [2019-01-18 18:15:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2019-01-18 18:15:12,067 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:15:12,068 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 1, 1] [2019-01-18 18:15:12,068 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:15:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:15:12,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1198974704, now seen corresponding path program 90 times [2019-01-18 18:15:12,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:15:12,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:12,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:15:12,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:12,069 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:15:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:15:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:15,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:15,719 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:15:15,719 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:15:15,719 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:15:15,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:15,719 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 [2019-01-18 18:15:15,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:15:15,727 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:15:15,838 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:15:15,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:15:15,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:15:15,849 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 [2019-01-18 18:15:15,850 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:15:15,860 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:15:15,860 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:15:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:20,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:15:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16290 backedges. 0 proven. 16290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:24,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:15:24,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 191 [2019-01-18 18:15:24,403 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:15:24,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2019-01-18 18:15:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2019-01-18 18:15:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-18 18:15:24,406 INFO L87 Difference]: Start difference. First operand 365 states and 365 transitions. Second operand 184 states. [2019-01-18 18:15:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:15:25,078 INFO L93 Difference]: Finished difference Result 371 states and 371 transitions. [2019-01-18 18:15:25,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-01-18 18:15:25,078 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 364 [2019-01-18 18:15:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:15:25,080 INFO L225 Difference]: With dead ends: 371 [2019-01-18 18:15:25,080 INFO L226 Difference]: Without dead ends: 370 [2019-01-18 18:15:25,081 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 544 SyntacticMatches, 82 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30277 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=14433, Invalid=22623, Unknown=0, NotChecked=0, Total=37056 [2019-01-18 18:15:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-01-18 18:15:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 369. [2019-01-18 18:15:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2019-01-18 18:15:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 369 transitions. [2019-01-18 18:15:25,086 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 369 transitions. Word has length 364 [2019-01-18 18:15:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:15:25,087 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 369 transitions. [2019-01-18 18:15:25,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2019-01-18 18:15:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 369 transitions. [2019-01-18 18:15:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-01-18 18:15:25,088 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:15:25,088 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 91, 91, 1, 1] [2019-01-18 18:15:25,088 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:15:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:15:25,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1390280489, now seen corresponding path program 91 times [2019-01-18 18:15:25,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:15:25,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:25,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:15:25,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:25,089 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:15:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:15:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:28,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:28,759 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:15:28,760 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:15:28,760 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:15:28,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:28,760 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 [2019-01-18 18:15:28,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:15:28,769 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:15:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:15:28,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:15:28,871 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 [2019-01-18 18:15:28,871 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:15:28,879 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:15:28,879 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:15:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:33,410 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:15:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16653 backedges. 0 proven. 16653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:37,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:15:37,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 192 [2019-01-18 18:15:37,481 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:15:37,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2019-01-18 18:15:37,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2019-01-18 18:15:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-18 18:15:37,484 INFO L87 Difference]: Start difference. First operand 369 states and 369 transitions. Second operand 186 states. [2019-01-18 18:15:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:15:38,164 INFO L93 Difference]: Finished difference Result 375 states and 375 transitions. [2019-01-18 18:15:38,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-01-18 18:15:38,165 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 368 [2019-01-18 18:15:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:15:38,166 INFO L225 Difference]: With dead ends: 375 [2019-01-18 18:15:38,166 INFO L226 Difference]: Without dead ends: 374 [2019-01-18 18:15:38,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 550 SyntacticMatches, 84 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30774 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=14535, Invalid=22907, Unknown=0, NotChecked=0, Total=37442 [2019-01-18 18:15:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2019-01-18 18:15:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2019-01-18 18:15:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2019-01-18 18:15:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 373 transitions. [2019-01-18 18:15:38,172 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 373 transitions. Word has length 368 [2019-01-18 18:15:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:15:38,172 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 373 transitions. [2019-01-18 18:15:38,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2019-01-18 18:15:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 373 transitions. [2019-01-18 18:15:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2019-01-18 18:15:38,174 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:15:38,174 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 1, 1] [2019-01-18 18:15:38,174 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:15:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:15:38,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1474538782, now seen corresponding path program 92 times [2019-01-18 18:15:38,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:15:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:38,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:15:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:38,175 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:15:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:15:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:41,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:41,971 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:15:41,971 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:15:41,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:15:41,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:41,971 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 [2019-01-18 18:15:41,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:15:41,980 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:15:42,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2019-01-18 18:15:42,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:15:42,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:15:42,577 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 [2019-01-18 18:15:42,577 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:15:42,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:15:42,586 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:15:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:47,177 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:15:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 0 proven. 17020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:51,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:15:51,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 193 [2019-01-18 18:15:51,275 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:15:51,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2019-01-18 18:15:51,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2019-01-18 18:15:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-18 18:15:51,278 INFO L87 Difference]: Start difference. First operand 373 states and 373 transitions. Second operand 188 states. [2019-01-18 18:15:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:15:51,951 INFO L93 Difference]: Finished difference Result 379 states and 379 transitions. [2019-01-18 18:15:51,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-01-18 18:15:51,952 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 372 [2019-01-18 18:15:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:15:51,953 INFO L225 Difference]: With dead ends: 379 [2019-01-18 18:15:51,953 INFO L226 Difference]: Without dead ends: 378 [2019-01-18 18:15:51,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 556 SyntacticMatches, 86 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31271 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=14637, Invalid=23193, Unknown=0, NotChecked=0, Total=37830 [2019-01-18 18:15:51,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-01-18 18:15:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 377. [2019-01-18 18:15:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2019-01-18 18:15:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 377 transitions. [2019-01-18 18:15:51,959 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 377 transitions. Word has length 372 [2019-01-18 18:15:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:15:51,959 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 377 transitions. [2019-01-18 18:15:51,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2019-01-18 18:15:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 377 transitions. [2019-01-18 18:15:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2019-01-18 18:15:51,961 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:15:51,961 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 1, 1] [2019-01-18 18:15:51,961 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:15:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:15:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash -903339493, now seen corresponding path program 93 times [2019-01-18 18:15:51,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:15:51,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:51,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:15:51,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:15:51,962 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:15:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:15:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:15:55,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:55,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:15:55,797 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:15:55,798 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:15:55,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:15:55,798 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 18:15:55,811 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:15:55,812 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:15:55,923 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:15:55,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:15:55,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:15:55,938 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 [2019-01-18 18:15:55,938 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:15:55,946 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:15:55,947 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:16:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:00,653 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:16:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17391 backedges. 0 proven. 17391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:04,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:16:04,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 194 [2019-01-18 18:16:04,709 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:16:04,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2019-01-18 18:16:04,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2019-01-18 18:16:04,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-18 18:16:04,712 INFO L87 Difference]: Start difference. First operand 377 states and 377 transitions. Second operand 190 states. [2019-01-18 18:16:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:16:05,356 INFO L93 Difference]: Finished difference Result 383 states and 383 transitions. [2019-01-18 18:16:05,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-01-18 18:16:05,356 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 376 [2019-01-18 18:16:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:16:05,358 INFO L225 Difference]: With dead ends: 383 [2019-01-18 18:16:05,359 INFO L226 Difference]: Without dead ends: 382 [2019-01-18 18:16:05,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 562 SyntacticMatches, 88 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31768 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=14739, Invalid=23481, Unknown=0, NotChecked=0, Total=38220 [2019-01-18 18:16:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2019-01-18 18:16:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 381. [2019-01-18 18:16:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2019-01-18 18:16:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 381 transitions. [2019-01-18 18:16:05,365 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 381 transitions. Word has length 376 [2019-01-18 18:16:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:16:05,365 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 381 transitions. [2019-01-18 18:16:05,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2019-01-18 18:16:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 381 transitions. [2019-01-18 18:16:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2019-01-18 18:16:05,367 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:16:05,367 INFO L402 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 1, 1] [2019-01-18 18:16:05,367 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:16:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:16:05,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1456975060, now seen corresponding path program 94 times [2019-01-18 18:16:05,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:16:05,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:05,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:16:05,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:05,368 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:16:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:16:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:09,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:09,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:16:09,323 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:16:09,324 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:16:09,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:09,324 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 [2019-01-18 18:16:09,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:16:09,332 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:16:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:16:09,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:16:09,437 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 [2019-01-18 18:16:09,437 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:16:09,462 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:16:09,462 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:16:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:14,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:16:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:18,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:16:18,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 195 [2019-01-18 18:16:18,384 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:16:18,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-01-18 18:16:18,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-01-18 18:16:18,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-18 18:16:18,387 INFO L87 Difference]: Start difference. First operand 381 states and 381 transitions. Second operand 192 states. [2019-01-18 18:16:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:16:19,113 INFO L93 Difference]: Finished difference Result 387 states and 387 transitions. [2019-01-18 18:16:19,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-01-18 18:16:19,113 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 380 [2019-01-18 18:16:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:16:19,115 INFO L225 Difference]: With dead ends: 387 [2019-01-18 18:16:19,115 INFO L226 Difference]: Without dead ends: 386 [2019-01-18 18:16:19,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 568 SyntacticMatches, 90 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32265 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14841, Invalid=23771, Unknown=0, NotChecked=0, Total=38612 [2019-01-18 18:16:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-01-18 18:16:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 385. [2019-01-18 18:16:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2019-01-18 18:16:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 385 transitions. [2019-01-18 18:16:19,121 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 385 transitions. Word has length 380 [2019-01-18 18:16:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:16:19,121 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 385 transitions. [2019-01-18 18:16:19,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-01-18 18:16:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 385 transitions. [2019-01-18 18:16:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2019-01-18 18:16:19,123 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:16:19,123 INFO L402 BasicCegarLoop]: trace histogram [96, 96, 95, 95, 1, 1] [2019-01-18 18:16:19,123 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:16:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:16:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1763626227, now seen corresponding path program 95 times [2019-01-18 18:16:19,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:16:19,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:19,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:16:19,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:19,124 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:16:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:16:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:23,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:23,169 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:16:23,170 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:16:23,170 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:16:23,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:23,170 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 [2019-01-18 18:16:23,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:16:23,179 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:16:23,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2019-01-18 18:16:23,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:16:23,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:16:23,803 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 [2019-01-18 18:16:23,803 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:16:23,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:16:23,812 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:16:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:28,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:16:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:32,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:16:32,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 196 [2019-01-18 18:16:32,781 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:16:32,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-01-18 18:16:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-01-18 18:16:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-18 18:16:32,784 INFO L87 Difference]: Start difference. First operand 385 states and 385 transitions. Second operand 194 states. [2019-01-18 18:16:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:16:33,561 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2019-01-18 18:16:33,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-01-18 18:16:33,561 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 384 [2019-01-18 18:16:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:16:33,563 INFO L225 Difference]: With dead ends: 391 [2019-01-18 18:16:33,563 INFO L226 Difference]: Without dead ends: 390 [2019-01-18 18:16:33,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 574 SyntacticMatches, 92 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32762 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=14943, Invalid=24063, Unknown=0, NotChecked=0, Total=39006 [2019-01-18 18:16:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-01-18 18:16:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2019-01-18 18:16:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-01-18 18:16:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 389 transitions. [2019-01-18 18:16:33,570 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 389 transitions. Word has length 384 [2019-01-18 18:16:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:16:33,570 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 389 transitions. [2019-01-18 18:16:33,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-01-18 18:16:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 389 transitions. [2019-01-18 18:16:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2019-01-18 18:16:33,572 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:16:33,572 INFO L402 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 1, 1] [2019-01-18 18:16:33,572 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:16:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:16:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash 232453318, now seen corresponding path program 96 times [2019-01-18 18:16:33,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:16:33,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:33,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:16:33,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:33,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:16:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:16:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:37,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:37,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:16:37,706 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:16:37,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:16:37,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:37,707 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 [2019-01-18 18:16:37,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:16:37,716 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:16:37,832 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:16:37,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:16:37,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:16:37,845 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 [2019-01-18 18:16:37,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:16:37,854 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:16:37,854 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:16:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:42,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:16:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18528 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:46,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:16:46,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 197 [2019-01-18 18:16:46,957 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:16:46,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-01-18 18:16:46,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-01-18 18:16:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-18 18:16:46,960 INFO L87 Difference]: Start difference. First operand 389 states and 389 transitions. Second operand 196 states. [2019-01-18 18:16:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:16:47,711 INFO L93 Difference]: Finished difference Result 395 states and 395 transitions. [2019-01-18 18:16:47,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-01-18 18:16:47,711 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 388 [2019-01-18 18:16:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:16:47,714 INFO L225 Difference]: With dead ends: 395 [2019-01-18 18:16:47,714 INFO L226 Difference]: Without dead ends: 394 [2019-01-18 18:16:47,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 580 SyntacticMatches, 94 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33259 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=15045, Invalid=24357, Unknown=0, NotChecked=0, Total=39402 [2019-01-18 18:16:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2019-01-18 18:16:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 393. [2019-01-18 18:16:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2019-01-18 18:16:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2019-01-18 18:16:47,721 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 388 [2019-01-18 18:16:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:16:47,721 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2019-01-18 18:16:47,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-01-18 18:16:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2019-01-18 18:16:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-01-18 18:16:47,722 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:16:47,722 INFO L402 BasicCegarLoop]: trace histogram [98, 98, 97, 97, 1, 1] [2019-01-18 18:16:47,723 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:16:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:16:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash 171651583, now seen corresponding path program 97 times [2019-01-18 18:16:47,723 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:16:47,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:47,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:16:47,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:16:47,724 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:16:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:16:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:51,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:51,914 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:16:51,914 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:16:51,915 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:16:51,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:16:51,915 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 [2019-01-18 18:16:51,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:16:51,923 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:16:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:16:52,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:16:52,033 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 [2019-01-18 18:16:52,033 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:16:52,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:16:52,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:16:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:16:57,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:17:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18915 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:01,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:17:01,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 198 [2019-01-18 18:17:01,312 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:17:01,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-01-18 18:17:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-01-18 18:17:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-18 18:17:01,314 INFO L87 Difference]: Start difference. First operand 393 states and 393 transitions. Second operand 198 states. [2019-01-18 18:17:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:17:02,006 INFO L93 Difference]: Finished difference Result 399 states and 399 transitions. [2019-01-18 18:17:02,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-01-18 18:17:02,006 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 392 [2019-01-18 18:17:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:17:02,008 INFO L225 Difference]: With dead ends: 399 [2019-01-18 18:17:02,008 INFO L226 Difference]: Without dead ends: 398 [2019-01-18 18:17:02,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 586 SyntacticMatches, 96 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=15147, Invalid=24653, Unknown=0, NotChecked=0, Total=39800 [2019-01-18 18:17:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2019-01-18 18:17:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2019-01-18 18:17:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2019-01-18 18:17:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 397 transitions. [2019-01-18 18:17:02,015 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 397 transitions. Word has length 392 [2019-01-18 18:17:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:17:02,015 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 397 transitions. [2019-01-18 18:17:02,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-01-18 18:17:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 397 transitions. [2019-01-18 18:17:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-01-18 18:17:02,016 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:17:02,016 INFO L402 BasicCegarLoop]: trace histogram [99, 99, 98, 98, 1, 1] [2019-01-18 18:17:02,017 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:17:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:17:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash 894970552, now seen corresponding path program 98 times [2019-01-18 18:17:02,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:17:02,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:17:02,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:17:02,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:17:02,018 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:17:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:17:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:06,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:17:06,258 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:17:06,258 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:17:06,258 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:17:06,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:17:06,258 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 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 [2019-01-18 18:17:06,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 18:17:06,267 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 18:17:06,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 99 check-sat command(s) [2019-01-18 18:17:06,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:17:06,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:17:06,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-01-18 18:17:06,930 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:17:06,993 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:17:06,994 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:17:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:12,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:17:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19306 backedges. 0 proven. 19306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:16,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:17:16,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 199 [2019-01-18 18:17:16,320 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:17:16,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-01-18 18:17:16,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-01-18 18:17:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-18 18:17:16,323 INFO L87 Difference]: Start difference. First operand 397 states and 397 transitions. Second operand 200 states. [2019-01-18 18:17:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:17:17,056 INFO L93 Difference]: Finished difference Result 403 states and 403 transitions. [2019-01-18 18:17:17,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-01-18 18:17:17,057 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 396 [2019-01-18 18:17:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:17:17,059 INFO L225 Difference]: With dead ends: 403 [2019-01-18 18:17:17,059 INFO L226 Difference]: Without dead ends: 402 [2019-01-18 18:17:17,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 592 SyntacticMatches, 98 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34253 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=15249, Invalid=24951, Unknown=0, NotChecked=0, Total=40200 [2019-01-18 18:17:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2019-01-18 18:17:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 401. [2019-01-18 18:17:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2019-01-18 18:17:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 401 transitions. [2019-01-18 18:17:17,068 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 401 transitions. Word has length 396 [2019-01-18 18:17:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:17:17,068 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 401 transitions. [2019-01-18 18:17:17,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-01-18 18:17:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 401 transitions. [2019-01-18 18:17:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-01-18 18:17:17,070 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:17:17,071 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 1, 1] [2019-01-18 18:17:17,071 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:17:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:17:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash 594026225, now seen corresponding path program 99 times [2019-01-18 18:17:17,071 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:17:17,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:17:17,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:17:17,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:17:17,072 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:17:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:17:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:21,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:17:21,474 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:17:21,474 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:17:21,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:17:21,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:17:21,474 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 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 [2019-01-18 18:17:21,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 18:17:21,483 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 18:17:21,624 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 18:17:21,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 18:17:21,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:17:21,637 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 [2019-01-18 18:17:21,637 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 18:17:21,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 18:17:21,647 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2019-01-18 18:17:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:26,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:17:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19701 backedges. 0 proven. 19701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:30,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:17:30,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 200 [2019-01-18 18:17:30,968 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:17:30,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-01-18 18:17:30,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-01-18 18:17:30,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-18 18:17:30,971 INFO L87 Difference]: Start difference. First operand 401 states and 401 transitions. Second operand 202 states. [2019-01-18 18:17:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:17:31,738 INFO L93 Difference]: Finished difference Result 407 states and 407 transitions. [2019-01-18 18:17:31,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-01-18 18:17:31,739 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 400 [2019-01-18 18:17:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:17:31,741 INFO L225 Difference]: With dead ends: 407 [2019-01-18 18:17:31,741 INFO L226 Difference]: Without dead ends: 406 [2019-01-18 18:17:31,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 599 SyntacticMatches, 99 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34551 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2019-01-18 18:17:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-01-18 18:17:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 405. [2019-01-18 18:17:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2019-01-18 18:17:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 405 transitions. [2019-01-18 18:17:31,748 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 405 transitions. Word has length 400 [2019-01-18 18:17:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:17:31,749 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 405 transitions. [2019-01-18 18:17:31,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-01-18 18:17:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 405 transitions. [2019-01-18 18:17:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-01-18 18:17:31,751 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 18:17:31,751 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 100, 100, 1, 1] [2019-01-18 18:17:31,751 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-01-18 18:17:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 18:17:31,752 INFO L82 PathProgramCache]: Analyzing trace with hash -478064982, now seen corresponding path program 100 times [2019-01-18 18:17:31,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 18:17:31,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:17:31,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 18:17:31,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 18:17:31,753 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 18:17:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:17:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 19603 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:36,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:17:36,039 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 18:17:36,039 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 18:17:36,039 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 18:17:36,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 18:17:36,039 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 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 [2019-01-18 18:17:36,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 18:17:36,048 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 18:17:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 18:17:36,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 18:17:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 20000 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:36,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 18:17:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20100 backedges. 20000 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 18:17:40,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 18:17:40,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 104 [2019-01-18 18:17:40,421 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 18:17:40,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-01-18 18:17:40,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-01-18 18:17:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5258, Invalid=5662, Unknown=0, NotChecked=0, Total=10920 [2019-01-18 18:17:40,423 INFO L87 Difference]: Start difference. First operand 405 states and 405 transitions. Second operand 105 states. [2019-01-18 18:17:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 18:17:41,733 INFO L93 Difference]: Finished difference Result 408 states and 408 transitions. [2019-01-18 18:17:41,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-01-18 18:17:41,733 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 404 [2019-01-18 18:17:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 18:17:41,734 INFO L225 Difference]: With dead ends: 408 [2019-01-18 18:17:41,734 INFO L226 Difference]: Without dead ends: 0 [2019-01-18 18:17:41,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 706 SyntacticMatches, 100 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5643 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5362, Invalid=5768, Unknown=0, NotChecked=0, Total=11130 [2019-01-18 18:17:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-18 18:17:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-18 18:17:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-18 18:17:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-18 18:17:41,737 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 404 [2019-01-18 18:17:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 18:17:41,737 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-18 18:17:41,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-01-18 18:17:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-18 18:17:41,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 18:17:41,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-18 18:17:41,849 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 511 [2019-01-18 18:17:44,780 WARN L181 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 511 DAG size of output: 509 [2019-01-18 18:17:44,787 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 3 24) no Hoare annotation was computed. [2019-01-18 18:17:44,788 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 17) no Hoare annotation was computed. [2019-01-18 18:17:44,788 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 3 24) no Hoare annotation was computed. [2019-01-18 18:17:44,788 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-01-18 18:17:44,788 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2019-01-18 18:17:44,788 INFO L448 ceAbstractionStarter]: For program point L16-1(lines 16 20) no Hoare annotation was computed. [2019-01-18 18:17:44,790 INFO L444 ceAbstractionStarter]: At program point L13-1(lines 13 22) 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_p.offset 276) main_q.offset) (<= main_q.offset 276) .cse0) (and (<= main_q.offset 356) (<= (+ main_p.offset 356) main_q.offset) .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 312) main_q.offset) (<= main_q.offset 312) .cse0) (and (<= (+ main_p.offset 396) main_q.offset) (<= main_q.offset 396) .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 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 156) main_q.offset) (<= main_q.offset 156) .cse0) (and (<= (+ main_p.offset 364) main_q.offset) (<= main_q.offset 364) .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 0) .cse0 (= main_p.offset main_q.offset)) (and (<= (+ main_p.offset 40) main_q.offset) (<= main_q.offset 40) .cse0) (and (<= main_q.offset 256) (<= (+ main_p.offset 256) main_q.offset) .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))) [2019-01-18 18:17:44,790 INFO L448 ceAbstractionStarter]: For program point L13-2(lines 3 24) no Hoare annotation was computed. [2019-01-18 18:17:44,831 INFO L202 PluginConnector]: Adding new model PointerIncrement-simplified02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:17:44 BoogieIcfgContainer [2019-01-18 18:17:44,831 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-18 18:17:44,832 INFO L168 Benchmark]: Toolchain (without parser) took 726618.19 ms. Allocated memory was 133.2 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 108.1 MB in the beginning and 632.6 MB in the end (delta: -524.5 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2019-01-18 18:17:44,833 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 133.2 MB. Free memory is still 109.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 18:17:44,833 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.30 ms. Allocated memory is still 133.2 MB. Free memory was 108.1 MB in the beginning and 105.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-01-18 18:17:44,833 INFO L168 Benchmark]: Boogie Preprocessor took 21.59 ms. Allocated memory is still 133.2 MB. Free memory was 105.9 MB in the beginning and 104.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-18 18:17:44,834 INFO L168 Benchmark]: RCFGBuilder took 369.71 ms. Allocated memory is still 133.2 MB. Free memory was 104.7 MB in the beginning and 94.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-01-18 18:17:44,834 INFO L168 Benchmark]: TraceAbstraction took 726162.76 ms. Allocated memory was 133.2 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 94.1 MB in the beginning and 632.6 MB in the end (delta: -538.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2019-01-18 18:17:44,836 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 0.26 ms. Allocated memory is still 133.2 MB. Free memory is still 109.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 60.30 ms. Allocated memory is still 133.2 MB. Free memory was 108.1 MB in the beginning and 105.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.59 ms. Allocated memory is still 133.2 MB. Free memory was 105.9 MB in the beginning and 104.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.71 ms. Allocated memory is still 133.2 MB. Free memory was 104.7 MB in the beginning and 94.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 726162.76 ms. Allocated memory was 133.2 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 94.1 MB in the beginning and 632.6 MB in the end (delta: -538.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 13]: 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])) || ((p!offset + 276 <= q!offset && q!offset <= 276) && 400 <= #length[q!base])) || ((q!offset <= 356 && p!offset + 356 <= q!offset) && 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 + 312 <= q!offset && q!offset <= 312) && 400 <= #length[q!base])) || ((p!offset + 396 <= q!offset && q!offset <= 396) && 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 + 284 <= q!offset && q!offset <= 284) && 400 <= #length[q!base])) || ((p!offset + 188 <= q!offset && q!offset <= 188) && 400 <= #length[q!base])) || ((p!offset + 8 <= q!offset && q!offset <= 8) && 400 <= #length[q!base])) || ((q!offset <= 348 && 400 <= #length[q!base]) && p!offset + 348 <= q!offset)) || p!offset + 400 <= q!offset) || ((p!offset + 224 <= q!offset && q!offset <= 224) && 400 <= #length[q!base])) || ((p!offset + 120 <= q!offset && q!offset <= 120) && 400 <= #length[q!base])) || ((q!offset <= 232 && p!offset + 232 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 92 && p!offset + 92 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 236 && p!offset + 236 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 328 <= q!offset && q!offset <= 328) && 400 <= #length[q!base])) || ((q!offset <= 12 && p!offset + 12 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 64 <= q!offset && q!offset <= 64) && 400 <= #length[q!base])) || ((p!offset + 192 <= q!offset && q!offset <= 192) && 400 <= #length[q!base])) || ((p!offset + 104 <= q!offset && q!offset <= 104) && 400 <= #length[q!base])) || ((q!offset <= 280 && p!offset + 280 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 316 <= q!offset && q!offset <= 316) && 400 <= #length[q!base])) || ((q!offset <= 152 && p!offset + 152 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 248 <= q!offset && q!offset <= 248) && 400 <= #length[q!base])) || ((q!offset <= 28 && p!offset + 28 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 68 <= q!offset && q!offset <= 68) && 400 <= #length[q!base])) || ((q!offset <= 4 && 400 <= #length[q!base]) && p!offset + 4 <= q!offset)) || ((p!offset + 204 <= q!offset && q!offset <= 204) && 400 <= #length[q!base])) || ((q!offset <= 380 && p!offset + 380 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 52 && p!offset + 52 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 172 <= q!offset && q!offset <= 172) && 400 <= #length[q!base])) || ((q!offset <= 56 && p!offset + 56 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 60 && p!offset + 60 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 100 && p!offset + 100 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 208 && p!offset + 208 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 220 <= q!offset && q!offset <= 220) && 400 <= #length[q!base])) || ((p!offset + 132 <= q!offset && q!offset <= 132) && 400 <= #length[q!base])) || ((q!offset <= 176 && p!offset + 176 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 116 && p!offset + 116 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 136 <= q!offset && q!offset <= 136) && 400 <= #length[q!base])) || ((q!offset <= 184 && p!offset + 184 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 20 && p!offset + 20 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 216 <= q!offset && q!offset <= 216) && 400 <= #length[q!base])) || ((p!offset + 376 <= q!offset && q!offset <= 376) && 400 <= #length[q!base])) || ((p!offset + 324 <= q!offset && q!offset <= 324) && 400 <= #length[q!base])) || ((p!offset + 72 <= q!offset && q!offset <= 72) && 400 <= #length[q!base])) || ((q!offset <= 76 && p!offset + 76 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 16 && p!offset + 16 <= q!offset) && 400 <= #length[q!base])) || ((q!offset <= 84 && p!offset + 84 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 156 <= q!offset && q!offset <= 156) && 400 <= #length[q!base])) || ((p!offset + 364 <= q!offset && q!offset <= 364) && 400 <= #length[q!base])) || ((p!offset + 88 <= q!offset && 400 <= #length[q!base]) && q!offset <= 88)) || ((q!offset <= 168 && p!offset + 168 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 48 <= q!offset && q!offset <= 48) && 400 <= #length[q!base])) || ((q!offset <= 252 && p!offset + 252 <= q!offset) && 400 <= #length[q!base])) || ((p!offset + 264 <= q!offset && q!offset <= 264) && 400 <= #length[q!base])) || ((p!offset + 388 <= q!offset && q!offset <= 388) && 400 <= #length[q!base])) || ((q!offset <= 0 && 400 <= #length[q!base]) && p!offset == q!offset)) || ((p!offset + 40 <= q!offset && q!offset <= 40) && 400 <= #length[q!base])) || ((q!offset <= 256 && p!offset + 256 <= q!offset) && 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, 8 locations, 1 error locations. SAFE Result, 726.0s OverallTime, 101 OverallIterations, 101 TraceHistogramMax, 43.6s AutomataDifference, 0.0s DeadEndRemovalTime, 3.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 403 SDtfs, 7610 SDslu, 7951 SDs, 0 SdLazy, 28139 SolverSat, 355 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46154 GetRequests, 30803 SyntacticMatches, 2649 SemanticMatches, 12702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303267 ImplicationChecksByTransitivity, 600.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred in iteration=100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 21.2s 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: 1.0s SsaConstructionTime, 13.7s SatisfiabilityAnalysisTime, 632.0s InterpolantComputationTime, 41204 NumberOfCodeBlocks, 41204 NumberOfCodeBlocksAsserted, 1884 NumberOfCheckSat, 61503 ConstructedInterpolants, 0 QuantifiedInterpolants, 126003756 SizeOfPredicates, 596 NumberOfNonLiveVariables, 37650 ConjunctsInSsa, 15943 ConjunctsInUnsatCore, 301 InterpolantComputations, 1 PerfectInterpolantSequences, 59603/2045250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...