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/HiddenEquality-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c78c21b [2018-12-03 19:26:29,055 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 19:26:29,061 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 19:26:29,081 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 19:26:29,081 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 19:26:29,082 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 19:26:29,085 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 19:26:29,086 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 19:26:29,091 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 19:26:29,094 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 19:26:29,095 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-03 19:26:29,132 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 [2018-12-03 19:26:29,158 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 19:26:29,159 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 19:26:29,159 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-03 19:26:29,160 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-03 19:26:29,160 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 19:26:29,160 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 19:26:29,160 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 19:26:29,160 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 19:26:29,161 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 19:26:29,161 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-03 19:26:29,162 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-03 19:26:29,162 INFO L133 SettingsManager]: * Log string format=TERM [2018-12-03 19:26:29,162 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 19:26:29,162 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 19:26:29,163 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 19:26:29,163 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 19:26:29,163 INFO L133 SettingsManager]: * Use SBE=true [2018-12-03 19:26:29,163 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 19:26:29,165 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 19:26:29,166 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 19:26:29,166 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 19:26:29,166 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 19:26:29,166 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 19:26:29,166 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 19:26:29,166 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 19:26:29,167 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 19:26:29,167 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 19:26:29,167 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 19:26:29,168 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 19:26:29,168 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 19:26:29,168 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 19:26:29,168 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 19:26:29,168 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 19:26:29,169 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 19:26:29,169 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 19:26:29,169 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 19:26:29,169 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 19:26:29,169 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 19:26:29,169 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 19:26:29,171 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-03 19:26:29,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 19:26:29,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 19:26:29,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 19:26:29,240 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-03 19:26:29,240 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-03 19:26:29,241 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl [2018-12-03 19:26:29,241 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl' [2018-12-03 19:26:29,274 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 19:26:29,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-03 19:26:29,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 19:26:29,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 19:26:29,277 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 19:26:29,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,313 WARN L165 Inliner]: Program contained no entry procedure! [2018-12-03 19:26:29,315 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-12-03 19:26:29,315 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-12-03 19:26:29,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 19:26:29,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 19:26:29,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 19:26:29,320 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 19:26:29,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... [2018-12-03 19:26:29,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 19:26:29,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 19:26:29,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 19:26:29,344 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 19:26:29,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 19:26:29,419 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-12-03 19:26:29,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 19:26:29,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 19:26:29,549 INFO L272 CfgBuilder]: Using library mode [2018-12-03 19:26:29,549 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 19:26:29,550 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:26:29 BoogieIcfgContainer [2018-12-03 19:26:29,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 19:26:29,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 19:26:29,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 19:26:29,554 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 19:26:29,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.12 07:26:29" (1/2) ... [2018-12-03 19:26:29,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ac2309 and model type HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:26:29, skipping insertion in model container [2018-12-03 19:26:29,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:26:29" (2/2) ... [2018-12-03 19:26:29,558 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEquality-Safe.bpl [2018-12-03 19:26:29,567 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 19:26:29,574 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 19:26:29,592 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 19:26:29,623 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 19:26:29,624 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 19:26:29,624 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 19:26:29,624 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 19:26:29,624 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 19:26:29,624 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 19:26:29,624 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 19:26:29,625 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 19:26:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-12-03 19:26:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-03 19:26:29,646 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:29,647 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-03 19:26:29,650 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:29,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-12-03 19:26:29,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:29,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:29,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:29,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:29,708 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:29,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:26:29,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-03 19:26:29,793 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:26:29,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 19:26:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 19:26:29,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 19:26:29,812 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-12-03 19:26:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:29,846 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 19:26:29,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 19:26:29,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-03 19:26:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:29,859 INFO L225 Difference]: With dead ends: 9 [2018-12-03 19:26:29,859 INFO L226 Difference]: Without dead ends: 4 [2018-12-03 19:26:29,863 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 [2018-12-03 19:26:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-12-03 19:26:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-12-03 19:26:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-03 19:26:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-12-03 19:26:29,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-12-03 19:26:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:29,900 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-12-03 19:26:29,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 19:26:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-12-03 19:26:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-03 19:26:29,901 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:29,901 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-03 19:26:29,901 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:29,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:29,902 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-12-03 19:26:29,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:29,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:29,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:29,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:29,903 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:30,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:30,051 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:30,052 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-03 19:26:30,055 INFO L205 CegarAbsIntRunner]: [0], [4], [6] [2018-12-03 19:26:30,125 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-03 19:26:30,126 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 19:26:30,329 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 19:26:30,331 INFO L272 AbstractInterpreter]: Visited 3 different actions 17 times. Merged at 2 different actions 8 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-03 19:26:30,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:30,379 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 19:26:30,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:30,379 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:30,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:30,398 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:30,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:30,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:30,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:30,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2018-12-03 19:26:30,598 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:30,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 19:26:30,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 19:26:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 19:26:30,600 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-12-03 19:26:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:30,628 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-12-03 19:26:30,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 19:26:30,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-03 19:26:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:30,629 INFO L225 Difference]: With dead ends: 6 [2018-12-03 19:26:30,629 INFO L226 Difference]: Without dead ends: 5 [2018-12-03 19:26:30,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-03 19:26:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-12-03 19:26:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-12-03 19:26:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-03 19:26:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-12-03 19:26:30,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-12-03 19:26:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:30,634 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-12-03 19:26:30,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 19:26:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-12-03 19:26:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-03 19:26:30,635 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:30,636 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-12-03 19:26:30,636 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:30,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-12-03 19:26:30,637 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:30,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:30,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:30,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:30,638 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:30,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:30,731 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:30,731 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:30,731 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:30,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:30,732 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:30,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:30,744 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:30,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 19:26:30,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:30,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:30,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:30,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:30,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2018-12-03 19:26:30,913 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:30,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 19:26:30,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 19:26:30,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 19:26:30,915 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-12-03 19:26:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:30,964 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-12-03 19:26:30,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 19:26:30,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-12-03 19:26:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:30,966 INFO L225 Difference]: With dead ends: 7 [2018-12-03 19:26:30,966 INFO L226 Difference]: Without dead ends: 6 [2018-12-03 19:26:30,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-03 19:26:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-12-03 19:26:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-12-03 19:26:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-03 19:26:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-12-03 19:26:30,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-12-03 19:26:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:30,970 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-12-03 19:26:30,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 19:26:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-12-03 19:26:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-03 19:26:30,970 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:30,970 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-12-03 19:26:30,971 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:30,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:30,971 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-12-03 19:26:30,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:30,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:30,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:30,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:30,973 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:31,116 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:31,117 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:31,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:31,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:31,117 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:31,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:31,136 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:31,170 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:31,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:31,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:31,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2018-12-03 19:26:31,362 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:31,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 19:26:31,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 19:26:31,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 19:26:31,364 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-12-03 19:26:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:31,435 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-12-03 19:26:31,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 19:26:31,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-03 19:26:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:31,436 INFO L225 Difference]: With dead ends: 8 [2018-12-03 19:26:31,436 INFO L226 Difference]: Without dead ends: 7 [2018-12-03 19:26:31,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-03 19:26:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-03 19:26:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-03 19:26:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-03 19:26:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-03 19:26:31,439 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-03 19:26:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:31,440 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-03 19:26:31,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 19:26:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-03 19:26:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-03 19:26:31,443 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:31,443 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-12-03 19:26:31,443 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:31,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-12-03 19:26:31,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:31,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:31,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:31,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:31,445 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:31,577 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:31,577 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:31,577 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:31,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:31,578 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:31,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:31,600 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:31,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:31,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-03 19:26:31,786 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:31,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 19:26:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 19:26:31,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-03 19:26:31,788 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-12-03 19:26:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:31,805 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-12-03 19:26:31,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 19:26:31,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-03 19:26:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:31,808 INFO L225 Difference]: With dead ends: 9 [2018-12-03 19:26:31,808 INFO L226 Difference]: Without dead ends: 8 [2018-12-03 19:26:31,809 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-03 19:26:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-03 19:26:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-03 19:26:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-03 19:26:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-12-03 19:26:31,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-12-03 19:26:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:31,812 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-12-03 19:26:31,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 19:26:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-03 19:26:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-03 19:26:31,813 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:31,813 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-12-03 19:26:31,813 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:31,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-12-03 19:26:31,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:31,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:31,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:31,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:31,816 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:31,938 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:31,939 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:31,939 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:31,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:31,940 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:31,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:31,949 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:31,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-03 19:26:31,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:31,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:31,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:32,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:32,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-12-03 19:26:32,475 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:32,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 19:26:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 19:26:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-03 19:26:32,477 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-12-03 19:26:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:32,505 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-12-03 19:26:32,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 19:26:32,505 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-03 19:26:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:32,506 INFO L225 Difference]: With dead ends: 10 [2018-12-03 19:26:32,506 INFO L226 Difference]: Without dead ends: 9 [2018-12-03 19:26:32,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-03 19:26:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-03 19:26:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-03 19:26:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-03 19:26:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-03 19:26:32,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-12-03 19:26:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:32,511 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-03 19:26:32,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 19:26:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-03 19:26:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-03 19:26:32,512 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:32,512 INFO L402 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-12-03 19:26:32,512 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:32,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-12-03 19:26:32,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:32,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:32,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:32,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:32,514 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:32,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:32,642 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:32,642 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:32,642 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:32,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:32,643 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:32,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:32,654 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:32,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:32,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:32,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:32,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:32,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:32,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2018-12-03 19:26:32,852 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:32,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 19:26:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 19:26:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-03 19:26:32,853 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-12-03 19:26:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:32,892 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-12-03 19:26:32,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 19:26:32,892 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-12-03 19:26:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:32,893 INFO L225 Difference]: With dead ends: 11 [2018-12-03 19:26:32,893 INFO L226 Difference]: Without dead ends: 10 [2018-12-03 19:26:32,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-03 19:26:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-12-03 19:26:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-03 19:26:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-03 19:26:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-12-03 19:26:32,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-12-03 19:26:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:32,897 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-12-03 19:26:32,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 19:26:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-12-03 19:26:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-03 19:26:32,897 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:32,898 INFO L402 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-12-03 19:26:32,898 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:32,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-12-03 19:26:32,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:32,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:32,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:32,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:32,900 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:33,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:33,054 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:33,054 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:33,055 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:33,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:33,055 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:33,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:33,064 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:33,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:33,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:33,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:33,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2018-12-03 19:26:33,415 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:33,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 19:26:33,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 19:26:33,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-03 19:26:33,417 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-12-03 19:26:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:33,457 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-12-03 19:26:33,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 19:26:33,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-12-03 19:26:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:33,458 INFO L225 Difference]: With dead ends: 12 [2018-12-03 19:26:33,459 INFO L226 Difference]: Without dead ends: 11 [2018-12-03 19:26:33,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-03 19:26:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-03 19:26:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-12-03 19:26:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-03 19:26:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-12-03 19:26:33,462 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-12-03 19:26:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:33,462 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-12-03 19:26:33,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 19:26:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-12-03 19:26:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-03 19:26:33,463 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:33,463 INFO L402 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-12-03 19:26:33,463 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:33,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:33,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-12-03 19:26:33,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:33,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:33,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:33,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:33,465 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:33,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:33,568 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:33,569 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:33,569 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:33,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:33,569 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 19:26:33,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:33,580 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:33,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-03 19:26:33,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:33,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:33,600 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:33,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:33,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2018-12-03 19:26:33,991 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:33,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 19:26:33,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 19:26:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-03 19:26:33,993 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-12-03 19:26:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:34,022 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-12-03 19:26:34,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 19:26:34,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-12-03 19:26:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:34,024 INFO L225 Difference]: With dead ends: 13 [2018-12-03 19:26:34,024 INFO L226 Difference]: Without dead ends: 12 [2018-12-03 19:26:34,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-03 19:26:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-03 19:26:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-03 19:26:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-03 19:26:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-03 19:26:34,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-03 19:26:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:34,029 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-03 19:26:34,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 19:26:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-03 19:26:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-03 19:26:34,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:34,029 INFO L402 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-12-03 19:26:34,030 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:34,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:34,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-12-03 19:26:34,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:34,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:34,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:34,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:34,031 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:34,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:34,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:34,160 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:34,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:34,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:34,160 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:34,170 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:34,170 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:34,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:34,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:34,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:34,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:34,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:34,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2018-12-03 19:26:34,427 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:34,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 19:26:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 19:26:34,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-03 19:26:34,428 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-12-03 19:26:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:34,452 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-12-03 19:26:34,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 19:26:34,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-12-03 19:26:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:34,454 INFO L225 Difference]: With dead ends: 14 [2018-12-03 19:26:34,454 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 19:26:34,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-03 19:26:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 19:26:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-03 19:26:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-03 19:26:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-12-03 19:26:34,458 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-12-03 19:26:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:34,458 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-12-03 19:26:34,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 19:26:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-12-03 19:26:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-03 19:26:34,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:34,460 INFO L402 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-12-03 19:26:34,460 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:34,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:34,460 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-12-03 19:26:34,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:34,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:34,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:34,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:34,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:34,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:34,719 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:34,719 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:34,719 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:34,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:34,720 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:34,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:34,729 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:34,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:34,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:35,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:35,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-12-03 19:26:35,043 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:35,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 19:26:35,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 19:26:35,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-03 19:26:35,044 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-12-03 19:26:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:35,069 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-12-03 19:26:35,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 19:26:35,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-12-03 19:26:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:35,070 INFO L225 Difference]: With dead ends: 15 [2018-12-03 19:26:35,071 INFO L226 Difference]: Without dead ends: 14 [2018-12-03 19:26:35,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-03 19:26:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-03 19:26:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-03 19:26:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-03 19:26:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-12-03 19:26:35,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-12-03 19:26:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:35,075 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-12-03 19:26:35,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 19:26:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-12-03 19:26:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 19:26:35,076 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:35,076 INFO L402 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-12-03 19:26:35,076 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:35,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-12-03 19:26:35,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:35,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:35,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:35,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:35,078 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:35,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:35,374 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:35,374 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:35,374 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:35,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:35,374 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:35,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:35,402 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:35,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-03 19:26:35,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:35,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:35,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:35,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:35,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2018-12-03 19:26:35,874 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:35,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 19:26:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 19:26:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-03 19:26:35,875 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-12-03 19:26:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:35,903 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-03 19:26:35,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 19:26:35,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-12-03 19:26:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:35,905 INFO L225 Difference]: With dead ends: 16 [2018-12-03 19:26:35,905 INFO L226 Difference]: Without dead ends: 15 [2018-12-03 19:26:35,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-03 19:26:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-03 19:26:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-03 19:26:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-03 19:26:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-03 19:26:35,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-12-03 19:26:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:35,909 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-03 19:26:35,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 19:26:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-03 19:26:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 19:26:35,910 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:35,910 INFO L402 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-12-03 19:26:35,910 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:35,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-12-03 19:26:35,910 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:35,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:35,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:35,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:35,912 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:36,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:36,068 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:36,068 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:36,068 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:36,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:36,068 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:36,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:36,079 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:36,094 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:36,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:36,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:36,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:36,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:36,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2018-12-03 19:26:36,476 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:36,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 19:26:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 19:26:36,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-03 19:26:36,477 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-12-03 19:26:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:36,542 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-12-03 19:26:36,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 19:26:36,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-12-03 19:26:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:36,543 INFO L225 Difference]: With dead ends: 17 [2018-12-03 19:26:36,543 INFO L226 Difference]: Without dead ends: 16 [2018-12-03 19:26:36,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-03 19:26:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-03 19:26:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-03 19:26:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-03 19:26:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-03 19:26:36,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-12-03 19:26:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:36,547 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-03 19:26:36,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 19:26:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-03 19:26:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-03 19:26:36,548 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:36,548 INFO L402 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-12-03 19:26:36,548 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:36,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-12-03 19:26:36,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:36,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:36,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:36,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:36,550 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:36,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:36,944 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:36,944 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:36,944 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:36,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:36,944 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:36,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:36,954 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:36,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:36,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:37,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:37,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2018-12-03 19:26:37,422 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:37,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 19:26:37,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 19:26:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-03 19:26:37,423 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-12-03 19:26:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:37,615 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-12-03 19:26:37,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 19:26:37,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-12-03 19:26:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:37,616 INFO L225 Difference]: With dead ends: 18 [2018-12-03 19:26:37,616 INFO L226 Difference]: Without dead ends: 17 [2018-12-03 19:26:37,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-03 19:26:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-03 19:26:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-03 19:26:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-03 19:26:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-03 19:26:37,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-12-03 19:26:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:37,625 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-03 19:26:37,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 19:26:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-03 19:26:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-03 19:26:37,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:37,626 INFO L402 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-12-03 19:26:37,626 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:37,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-12-03 19:26:37,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:37,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:37,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:37,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:37,628 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:37,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:37,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:37,869 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:37,869 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:37,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:37,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:37,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:37,878 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:37,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-12-03 19:26:37,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:37,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:37,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:38,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:38,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2018-12-03 19:26:38,324 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:38,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 19:26:38,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 19:26:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-03 19:26:38,325 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-12-03 19:26:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:38,355 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-12-03 19:26:38,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 19:26:38,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-12-03 19:26:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:38,357 INFO L225 Difference]: With dead ends: 19 [2018-12-03 19:26:38,357 INFO L226 Difference]: Without dead ends: 18 [2018-12-03 19:26:38,358 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-03 19:26:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-03 19:26:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-03 19:26:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-03 19:26:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-03 19:26:38,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-12-03 19:26:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:38,362 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-03 19:26:38,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 19:26:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-03 19:26:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-03 19:26:38,363 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:38,363 INFO L402 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-12-03 19:26:38,363 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:38,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:38,364 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-12-03 19:26:38,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:38,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:38,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:38,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:38,365 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:38,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:38,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:38,618 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:38,618 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:38,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:38,618 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:38,626 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:38,626 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:38,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:38,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:38,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:38,672 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:39,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:39,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2018-12-03 19:26:39,243 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:39,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 19:26:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 19:26:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 19:26:39,244 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-12-03 19:26:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:39,279 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-12-03 19:26:39,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 19:26:39,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-12-03 19:26:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:39,282 INFO L225 Difference]: With dead ends: 20 [2018-12-03 19:26:39,282 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 19:26:39,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 19:26:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 19:26:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-03 19:26:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-03 19:26:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-12-03 19:26:39,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-12-03 19:26:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:39,286 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-12-03 19:26:39,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 19:26:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-12-03 19:26:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 19:26:39,287 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:39,287 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-12-03 19:26:39,288 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:39,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-12-03 19:26:39,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:39,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:39,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:39,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:39,289 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:40,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:40,108 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:40,108 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:40,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:40,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:40,109 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:40,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:40,122 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:40,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:40,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:41,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:41,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2018-12-03 19:26:41,016 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:41,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-03 19:26:41,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-03 19:26:41,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 19:26:41,017 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-12-03 19:26:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:41,042 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-12-03 19:26:41,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 19:26:41,042 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-12-03 19:26:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:41,043 INFO L225 Difference]: With dead ends: 21 [2018-12-03 19:26:41,043 INFO L226 Difference]: Without dead ends: 20 [2018-12-03 19:26:41,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 19:26:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-03 19:26:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-03 19:26:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-03 19:26:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-12-03 19:26:41,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-12-03 19:26:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:41,049 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-12-03 19:26:41,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-03 19:26:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-12-03 19:26:41,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-03 19:26:41,049 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:41,049 INFO L402 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-12-03 19:26:41,050 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:41,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:41,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-12-03 19:26:41,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:41,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:41,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:41,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:41,051 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:41,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:41,218 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:41,218 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:41,218 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:41,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:41,219 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:41,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:41,235 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:41,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-03 19:26:41,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:41,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:41,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:42,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:42,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2018-12-03 19:26:42,021 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:42,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 19:26:42,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 19:26:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 19:26:42,022 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-12-03 19:26:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:42,059 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-12-03 19:26:42,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 19:26:42,059 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-12-03 19:26:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:42,060 INFO L225 Difference]: With dead ends: 22 [2018-12-03 19:26:42,060 INFO L226 Difference]: Without dead ends: 21 [2018-12-03 19:26:42,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 19:26:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-03 19:26:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-03 19:26:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 19:26:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-03 19:26:42,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-12-03 19:26:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:42,064 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-03 19:26:42,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 19:26:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-03 19:26:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 19:26:42,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:42,065 INFO L402 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-12-03 19:26:42,065 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:42,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:42,066 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-12-03 19:26:42,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:42,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:42,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:42,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:42,067 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:42,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:42,744 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:42,744 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:42,744 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:42,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:42,744 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:42,753 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:42,753 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:42,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:42,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:42,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:42,802 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:43,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:43,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2018-12-03 19:26:43,402 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:43,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-03 19:26:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-03 19:26:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-03 19:26:43,404 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-12-03 19:26:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:43,499 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-03 19:26:43,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-03 19:26:43,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-12-03 19:26:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:43,500 INFO L225 Difference]: With dead ends: 23 [2018-12-03 19:26:43,500 INFO L226 Difference]: Without dead ends: 22 [2018-12-03 19:26:43,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-03 19:26:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-03 19:26:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-03 19:26:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-03 19:26:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-12-03 19:26:43,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-12-03 19:26:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:43,505 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-12-03 19:26:43,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-03 19:26:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-12-03 19:26:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-03 19:26:43,505 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:43,506 INFO L402 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-12-03 19:26:43,506 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:43,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-12-03 19:26:43,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:43,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:43,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:43,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:43,507 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:43,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:43,736 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:43,737 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:43,737 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:43,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:43,737 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:43,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:43,748 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:43,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:43,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:44,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:44,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2018-12-03 19:26:44,720 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:44,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 19:26:44,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 19:26:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-03 19:26:44,721 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-12-03 19:26:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:44,762 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-12-03 19:26:44,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-03 19:26:44,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-12-03 19:26:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:44,764 INFO L225 Difference]: With dead ends: 24 [2018-12-03 19:26:44,764 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 19:26:44,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-03 19:26:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 19:26:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-03 19:26:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-03 19:26:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-12-03 19:26:44,769 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-12-03 19:26:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:44,769 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-12-03 19:26:44,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 19:26:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-12-03 19:26:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-03 19:26:44,770 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:44,770 INFO L402 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-12-03 19:26:44,771 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:44,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-12-03 19:26:44,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:44,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:44,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:44,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:44,772 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:45,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:45,214 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:45,214 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:45,215 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:45,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:45,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:45,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:45,226 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:45,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-12-03 19:26:45,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:45,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:45,258 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:45,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:45,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2018-12-03 19:26:45,899 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:45,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-03 19:26:45,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-03 19:26:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 19:26:45,900 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-12-03 19:26:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:45,941 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-03 19:26:45,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-03 19:26:45,941 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-12-03 19:26:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:45,942 INFO L225 Difference]: With dead ends: 25 [2018-12-03 19:26:45,942 INFO L226 Difference]: Without dead ends: 24 [2018-12-03 19:26:45,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 19:26:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-03 19:26:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-03 19:26:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 19:26:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-12-03 19:26:45,946 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-12-03 19:26:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:45,947 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-12-03 19:26:45,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-03 19:26:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-12-03 19:26:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 19:26:45,947 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:45,948 INFO L402 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-12-03 19:26:45,948 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:45,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-12-03 19:26:45,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:45,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:45,949 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:46,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:46,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:46,205 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:46,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:46,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:46,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:46,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:46,214 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:46,239 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:46,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:46,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:46,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:46,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:46,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2018-12-03 19:26:46,948 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:46,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 19:26:46,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 19:26:46,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-03 19:26:46,949 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-12-03 19:26:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:47,062 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-03 19:26:47,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-03 19:26:47,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-12-03 19:26:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:47,065 INFO L225 Difference]: With dead ends: 26 [2018-12-03 19:26:47,065 INFO L226 Difference]: Without dead ends: 25 [2018-12-03 19:26:47,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-03 19:26:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-03 19:26:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-03 19:26:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 19:26:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-12-03 19:26:47,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-12-03 19:26:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:47,070 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-12-03 19:26:47,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 19:26:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-12-03 19:26:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-03 19:26:47,071 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:47,071 INFO L402 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-12-03 19:26:47,071 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:47,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-12-03 19:26:47,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:47,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:47,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:47,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:47,073 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:47,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:47,985 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:47,985 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:47,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:47,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:47,985 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:47,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:47,994 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:48,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:48,018 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:48,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:48,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2018-12-03 19:26:48,627 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:48,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-03 19:26:48,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-03 19:26:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-03 19:26:48,629 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-12-03 19:26:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:48,659 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-12-03 19:26:48,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-03 19:26:48,659 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-12-03 19:26:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:48,660 INFO L225 Difference]: With dead ends: 27 [2018-12-03 19:26:48,660 INFO L226 Difference]: Without dead ends: 26 [2018-12-03 19:26:48,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-03 19:26:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-03 19:26:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-03 19:26:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 19:26:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-03 19:26:48,665 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-12-03 19:26:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:48,665 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-03 19:26:48,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-03 19:26:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-03 19:26:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-03 19:26:48,666 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:48,666 INFO L402 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-12-03 19:26:48,667 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:48,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-12-03 19:26:48,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:48,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:48,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:48,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:48,668 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:48,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:48,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:48,971 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:48,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:48,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:48,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:48,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:48,980 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:49,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-12-03 19:26:49,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:49,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:49,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:49,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:49,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2018-12-03 19:26:49,944 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:49,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-03 19:26:49,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-03 19:26:49,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 19:26:49,945 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-12-03 19:26:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:49,986 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-03 19:26:49,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-03 19:26:49,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-12-03 19:26:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:49,988 INFO L225 Difference]: With dead ends: 28 [2018-12-03 19:26:49,988 INFO L226 Difference]: Without dead ends: 27 [2018-12-03 19:26:49,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-03 19:26:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-03 19:26:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-03 19:26:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-03 19:26:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-03 19:26:49,993 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-12-03 19:26:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:49,994 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-03 19:26:49,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-03 19:26:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-03 19:26:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 19:26:49,995 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:49,995 INFO L402 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-12-03 19:26:49,995 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:49,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-12-03 19:26:49,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:49,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:49,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:49,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:49,997 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:50,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:50,563 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:50,563 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:50,564 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:50,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:50,564 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:50,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:50,572 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:50,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:50,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:50,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:50,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:51,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:51,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2018-12-03 19:26:51,517 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:51,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-03 19:26:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-03 19:26:51,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 19:26:51,518 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-12-03 19:26:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:51,569 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-12-03 19:26:51,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-03 19:26:51,570 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-12-03 19:26:51,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:51,570 INFO L225 Difference]: With dead ends: 29 [2018-12-03 19:26:51,570 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 19:26:51,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-03 19:26:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 19:26:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-03 19:26:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-03 19:26:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-12-03 19:26:51,574 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-12-03 19:26:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:51,575 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-12-03 19:26:51,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-03 19:26:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-12-03 19:26:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-03 19:26:51,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:51,576 INFO L402 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-12-03 19:26:51,576 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:51,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-12-03 19:26:51,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:51,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:51,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:51,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:51,577 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:51,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:51,908 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:51,908 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:51,908 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:51,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:51,908 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:51,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:51,916 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:51,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:51,944 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:52,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:52,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2018-12-03 19:26:52,694 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:52,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-03 19:26:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-03 19:26:52,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-03 19:26:52,696 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-12-03 19:26:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:52,756 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-12-03 19:26:52,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-03 19:26:52,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-12-03 19:26:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:52,756 INFO L225 Difference]: With dead ends: 30 [2018-12-03 19:26:52,756 INFO L226 Difference]: Without dead ends: 29 [2018-12-03 19:26:52,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-03 19:26:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-03 19:26:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-03 19:26:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-03 19:26:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-12-03 19:26:52,763 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-12-03 19:26:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:52,763 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-12-03 19:26:52,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-03 19:26:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-12-03 19:26:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-03 19:26:52,764 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:52,764 INFO L402 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-12-03 19:26:52,764 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:52,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-12-03 19:26:52,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:52,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:52,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:52,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:52,766 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:53,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:53,121 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:53,121 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:53,121 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:53,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:53,121 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:53,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:53,130 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:53,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-12-03 19:26:53,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:53,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:53,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:55,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:55,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2018-12-03 19:26:55,149 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:55,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-03 19:26:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-03 19:26:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 19:26:55,151 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-12-03 19:26:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:55,191 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-12-03 19:26:55,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 19:26:55,192 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-12-03 19:26:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:55,192 INFO L225 Difference]: With dead ends: 31 [2018-12-03 19:26:55,192 INFO L226 Difference]: Without dead ends: 30 [2018-12-03 19:26:55,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-12-03 19:26:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-03 19:26:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-03 19:26:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 19:26:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-12-03 19:26:55,196 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-12-03 19:26:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:55,197 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-12-03 19:26:55,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-03 19:26:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-12-03 19:26:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-03 19:26:55,197 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:55,197 INFO L402 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-12-03 19:26:55,198 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:55,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:55,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-12-03 19:26:55,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:55,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:55,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:55,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:55,199 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:56,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:56,336 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:56,336 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:56,337 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:56,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:56,337 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:56,347 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:26:56,347 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:26:56,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:26:56,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:56,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:56,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:57,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:57,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2018-12-03 19:26:57,238 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:57,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-03 19:26:57,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-03 19:26:57,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-12-03 19:26:57,240 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-12-03 19:26:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:57,456 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-12-03 19:26:57,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 19:26:57,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-12-03 19:26:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:57,457 INFO L225 Difference]: With dead ends: 32 [2018-12-03 19:26:57,457 INFO L226 Difference]: Without dead ends: 31 [2018-12-03 19:26:57,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-12-03 19:26:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-03 19:26:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-03 19:26:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 19:26:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-12-03 19:26:57,460 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-12-03 19:26:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:57,460 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-12-03 19:26:57,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-03 19:26:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-12-03 19:26:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-03 19:26:57,462 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:57,462 INFO L402 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-12-03 19:26:57,462 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:57,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-12-03 19:26:57,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:57,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:57,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:26:57,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:57,463 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:57,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:57,858 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:57,858 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:57,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:57,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:57,859 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:57,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:57,868 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:26:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:57,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:57,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:26:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:58,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:26:58,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2018-12-03 19:26:58,885 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:26:58,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-03 19:26:58,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-03 19:26:58,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-12-03 19:26:58,887 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-12-03 19:26:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:26:58,951 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-12-03 19:26:58,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-03 19:26:58,952 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-12-03 19:26:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:26:58,953 INFO L225 Difference]: With dead ends: 33 [2018-12-03 19:26:58,953 INFO L226 Difference]: Without dead ends: 32 [2018-12-03 19:26:58,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-12-03 19:26:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-03 19:26:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-03 19:26:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-03 19:26:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-12-03 19:26:58,957 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-12-03 19:26:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:26:58,958 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-12-03 19:26:58,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-03 19:26:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-12-03 19:26:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-03 19:26:58,958 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:26:58,959 INFO L402 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-12-03 19:26:58,959 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:26:58,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:26:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-12-03 19:26:58,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:26:58,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:58,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:26:58,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:26:58,960 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:26:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:26:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:59,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:59,700 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:26:59,700 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:26:59,700 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:26:59,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:26:59,700 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:26:59,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:26:59,709 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:26:59,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-03 19:26:59,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:26:59,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:26:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:26:59,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:00,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:00,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2018-12-03 19:27:00,769 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:00,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-03 19:27:00,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-03 19:27:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 19:27:00,770 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-12-03 19:27:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:00,806 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-12-03 19:27:00,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-03 19:27:00,806 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-12-03 19:27:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:00,807 INFO L225 Difference]: With dead ends: 34 [2018-12-03 19:27:00,807 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 19:27:00,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-12-03 19:27:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 19:27:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-03 19:27:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-03 19:27:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-03 19:27:00,812 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-12-03 19:27:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:00,812 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-03 19:27:00,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-03 19:27:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-03 19:27:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-03 19:27:00,813 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:00,813 INFO L402 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-12-03 19:27:00,813 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:00,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-12-03 19:27:00,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:00,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:00,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:00,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:00,814 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:01,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:01,377 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:01,377 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:01,378 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:01,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:01,378 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:01,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:27:01,388 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:27:01,406 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:27:01,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:01,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:01,431 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:02,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:02,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 62 [2018-12-03 19:27:02,744 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:02,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-03 19:27:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-03 19:27:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-12-03 19:27:02,745 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-12-03 19:27:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:02,794 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-12-03 19:27:02,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-03 19:27:02,795 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-12-03 19:27:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:02,796 INFO L225 Difference]: With dead ends: 35 [2018-12-03 19:27:02,796 INFO L226 Difference]: Without dead ends: 34 [2018-12-03 19:27:02,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-12-03 19:27:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-03 19:27:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-12-03 19:27:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 19:27:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-12-03 19:27:02,799 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-12-03 19:27:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:02,799 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-12-03 19:27:02,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-03 19:27:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-12-03 19:27:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-03 19:27:02,800 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:02,800 INFO L402 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-12-03 19:27:02,801 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:02,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-12-03 19:27:02,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:02,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:02,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:02,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:02,802 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:03,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:03,258 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:03,258 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:03,258 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:03,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:03,258 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:03,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:03,267 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:27:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:03,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:03,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:04,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:04,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2018-12-03 19:27:04,534 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:04,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-03 19:27:04,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-03 19:27:04,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-12-03 19:27:04,536 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-12-03 19:27:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:04,653 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-12-03 19:27:04,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-03 19:27:04,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-12-03 19:27:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:04,654 INFO L225 Difference]: With dead ends: 36 [2018-12-03 19:27:04,654 INFO L226 Difference]: Without dead ends: 35 [2018-12-03 19:27:04,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-12-03 19:27:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-03 19:27:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-03 19:27:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-03 19:27:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-12-03 19:27:04,657 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-12-03 19:27:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:04,658 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-12-03 19:27:04,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-03 19:27:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-12-03 19:27:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-03 19:27:04,658 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:04,658 INFO L402 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-12-03 19:27:04,659 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:04,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:04,659 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-12-03 19:27:04,659 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:04,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:04,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:04,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:04,660 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:05,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:05,117 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:05,118 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:05,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:05,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:05,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:05,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:27:05,126 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:27:05,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-12-03 19:27:05,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:05,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:05,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:06,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:06,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2018-12-03 19:27:06,396 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:06,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-03 19:27:06,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-03 19:27:06,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 19:27:06,397 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-12-03 19:27:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:06,465 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-12-03 19:27:06,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-03 19:27:06,466 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-12-03 19:27:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:06,466 INFO L225 Difference]: With dead ends: 37 [2018-12-03 19:27:06,466 INFO L226 Difference]: Without dead ends: 36 [2018-12-03 19:27:06,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-03 19:27:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-03 19:27:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-03 19:27:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-03 19:27:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-12-03 19:27:06,471 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-12-03 19:27:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:06,471 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-12-03 19:27:06,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-03 19:27:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-12-03 19:27:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-03 19:27:06,472 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:06,472 INFO L402 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-12-03 19:27:06,472 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:06,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:06,473 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-12-03 19:27:06,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:06,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:06,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:06,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:06,474 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:07,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:07,040 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:07,040 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:07,040 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:07,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:07,041 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:07,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:27:07,049 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:27:07,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:27:07,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:07,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:07,080 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:08,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:08,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2018-12-03 19:27:08,340 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:08,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 19:27:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 19:27:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-12-03 19:27:08,342 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-12-03 19:27:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:08,437 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-12-03 19:27:08,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-03 19:27:08,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-12-03 19:27:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:08,438 INFO L225 Difference]: With dead ends: 38 [2018-12-03 19:27:08,439 INFO L226 Difference]: Without dead ends: 37 [2018-12-03 19:27:08,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-12-03 19:27:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-03 19:27:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-12-03 19:27:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-03 19:27:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-12-03 19:27:08,442 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-12-03 19:27:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:08,442 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-12-03 19:27:08,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 19:27:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-12-03 19:27:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 19:27:08,443 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:08,443 INFO L402 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-12-03 19:27:08,443 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:08,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-12-03 19:27:08,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:08,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:08,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:08,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:08,444 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:09,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:09,299 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:09,299 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:09,299 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:09,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:09,299 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:09,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:09,308 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:27:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:09,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:09,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:10,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:10,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2018-12-03 19:27:10,938 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:10,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-03 19:27:10,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-03 19:27:10,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-03 19:27:10,940 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-12-03 19:27:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:10,978 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-12-03 19:27:10,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-03 19:27:10,979 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-12-03 19:27:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:10,979 INFO L225 Difference]: With dead ends: 39 [2018-12-03 19:27:10,980 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 19:27:10,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-03 19:27:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 19:27:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-03 19:27:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-03 19:27:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-12-03 19:27:10,983 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-12-03 19:27:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:10,983 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-12-03 19:27:10,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-03 19:27:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-12-03 19:27:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 19:27:10,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:10,984 INFO L402 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-12-03 19:27:10,984 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:10,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-12-03 19:27:10,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:10,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:10,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:10,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:10,985 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:11,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:11,541 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:11,541 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:11,542 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:11,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:11,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:11,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:27:11,550 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:27:11,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-12-03 19:27:11,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:11,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:11,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:13,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:13,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2018-12-03 19:27:13,259 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:13,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-03 19:27:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-03 19:27:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 19:27:13,260 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-12-03 19:27:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:13,314 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-12-03 19:27:13,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-03 19:27:13,315 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-12-03 19:27:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:13,316 INFO L225 Difference]: With dead ends: 40 [2018-12-03 19:27:13,316 INFO L226 Difference]: Without dead ends: 39 [2018-12-03 19:27:13,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-12-03 19:27:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-03 19:27:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-03 19:27:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 19:27:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-12-03 19:27:13,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-12-03 19:27:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:13,320 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-12-03 19:27:13,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-03 19:27:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-12-03 19:27:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-03 19:27:13,321 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:13,321 INFO L402 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-12-03 19:27:13,321 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:13,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-12-03 19:27:13,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:13,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:13,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:13,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:13,322 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:13,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:13,872 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:13,872 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:13,872 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:13,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:13,873 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:13,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:27:13,882 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:27:13,902 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:27:13,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:13,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:13,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:15,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:15,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 74 [2018-12-03 19:27:15,798 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:15,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-03 19:27:15,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-03 19:27:15,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-12-03 19:27:15,799 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-12-03 19:27:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:15,854 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-12-03 19:27:15,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-03 19:27:15,854 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-12-03 19:27:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:15,855 INFO L225 Difference]: With dead ends: 41 [2018-12-03 19:27:15,855 INFO L226 Difference]: Without dead ends: 40 [2018-12-03 19:27:15,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-12-03 19:27:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-03 19:27:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-12-03 19:27:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-03 19:27:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-12-03 19:27:15,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-12-03 19:27:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:15,859 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-12-03 19:27:15,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-03 19:27:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-12-03 19:27:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-03 19:27:15,860 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:15,860 INFO L402 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-12-03 19:27:15,860 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:15,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-12-03 19:27:15,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:15,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:15,861 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:16,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:16,409 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:16,409 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:16,409 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:16,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:16,409 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:16,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:16,419 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:27:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:16,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:16,450 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:18,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:18,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2018-12-03 19:27:18,241 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:18,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-03 19:27:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-03 19:27:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-12-03 19:27:18,242 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-12-03 19:27:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:18,321 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-12-03 19:27:18,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-03 19:27:18,321 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-12-03 19:27:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:18,322 INFO L225 Difference]: With dead ends: 42 [2018-12-03 19:27:18,322 INFO L226 Difference]: Without dead ends: 41 [2018-12-03 19:27:18,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-12-03 19:27:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-03 19:27:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-03 19:27:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-03 19:27:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-12-03 19:27:18,324 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-12-03 19:27:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:18,325 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-12-03 19:27:18,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-03 19:27:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-12-03 19:27:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-03 19:27:18,325 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:18,325 INFO L402 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-12-03 19:27:18,325 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:18,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-12-03 19:27:18,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:18,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:18,326 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:19,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:19,079 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:19,079 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:19,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:19,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:19,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:19,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:27:19,088 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:27:19,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-12-03 19:27:19,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:19,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:19,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:20,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:20,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 78 [2018-12-03 19:27:20,878 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:20,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-03 19:27:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-03 19:27:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 19:27:20,879 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-12-03 19:27:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:20,941 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-12-03 19:27:20,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-03 19:27:20,941 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-12-03 19:27:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:20,942 INFO L225 Difference]: With dead ends: 43 [2018-12-03 19:27:20,942 INFO L226 Difference]: Without dead ends: 42 [2018-12-03 19:27:20,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-12-03 19:27:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-03 19:27:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-03 19:27:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-03 19:27:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-12-03 19:27:20,946 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-12-03 19:27:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:20,946 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-12-03 19:27:20,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-03 19:27:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-12-03 19:27:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-03 19:27:20,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:20,947 INFO L402 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-12-03 19:27:20,947 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:20,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-12-03 19:27:20,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:20,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:20,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:20,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:20,948 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:21,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:21,618 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:21,618 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:21,619 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:21,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:21,619 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:21,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:27:21,628 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:27:21,651 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:27:21,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:21,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:21,660 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:23,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:23,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2018-12-03 19:27:23,536 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:23,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-03 19:27:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-03 19:27:23,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-12-03 19:27:23,537 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-12-03 19:27:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:23,599 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-12-03 19:27:23,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-03 19:27:23,600 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-12-03 19:27:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:23,601 INFO L225 Difference]: With dead ends: 44 [2018-12-03 19:27:23,601 INFO L226 Difference]: Without dead ends: 43 [2018-12-03 19:27:23,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-12-03 19:27:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-03 19:27:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-03 19:27:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-03 19:27:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-12-03 19:27:23,604 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-12-03 19:27:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:23,604 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-12-03 19:27:23,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-03 19:27:23,604 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-12-03 19:27:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 19:27:23,605 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:23,605 INFO L402 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-12-03 19:27:23,605 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:23,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-12-03 19:27:23,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:23,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:23,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:23,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:23,606 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:24,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:24,294 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:24,295 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:24,295 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:24,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:24,295 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:24,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:24,305 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:27:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:24,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:24,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:26,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:26,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2018-12-03 19:27:26,443 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:26,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-03 19:27:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-03 19:27:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-03 19:27:26,444 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-12-03 19:27:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:26,519 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-12-03 19:27:26,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-03 19:27:26,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-12-03 19:27:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:26,520 INFO L225 Difference]: With dead ends: 45 [2018-12-03 19:27:26,520 INFO L226 Difference]: Without dead ends: 44 [2018-12-03 19:27:26,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-03 19:27:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-03 19:27:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-03 19:27:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 19:27:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-12-03 19:27:26,524 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-12-03 19:27:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:26,524 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-12-03 19:27:26,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-03 19:27:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-12-03 19:27:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 19:27:26,525 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:26,525 INFO L402 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-12-03 19:27:26,525 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:26,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-12-03 19:27:26,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:26,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:26,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:26,527 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:27,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:27,302 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:27,302 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:27,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:27,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:27,302 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:27,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:27:27,311 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:27:27,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-12-03 19:27:27,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:27,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:27,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:29,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:29,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 84 [2018-12-03 19:27:29,261 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:29,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-03 19:27:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-03 19:27:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 19:27:29,262 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-12-03 19:27:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:29,312 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-12-03 19:27:29,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-03 19:27:29,312 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-12-03 19:27:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:29,313 INFO L225 Difference]: With dead ends: 46 [2018-12-03 19:27:29,313 INFO L226 Difference]: Without dead ends: 45 [2018-12-03 19:27:29,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-12-03 19:27:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-03 19:27:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-03 19:27:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-03 19:27:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-12-03 19:27:29,316 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-12-03 19:27:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:29,317 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-12-03 19:27:29,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-03 19:27:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-12-03 19:27:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-03 19:27:29,317 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:29,317 INFO L402 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-12-03 19:27:29,317 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:29,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-12-03 19:27:29,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:29,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:29,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:29,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:29,319 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:30,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:30,327 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:30,327 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:30,327 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:30,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:30,327 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:30,336 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:27:30,336 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:27:30,361 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:27:30,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:30,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:30,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:32,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:32,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 86 [2018-12-03 19:27:32,375 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:32,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-03 19:27:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-03 19:27:32,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-12-03 19:27:32,376 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-12-03 19:27:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:32,431 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-12-03 19:27:32,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-03 19:27:32,431 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-12-03 19:27:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:32,432 INFO L225 Difference]: With dead ends: 47 [2018-12-03 19:27:32,432 INFO L226 Difference]: Without dead ends: 46 [2018-12-03 19:27:32,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-12-03 19:27:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-03 19:27:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-12-03 19:27:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-03 19:27:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-12-03 19:27:32,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-12-03 19:27:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:32,436 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-12-03 19:27:32,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-03 19:27:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-12-03 19:27:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-03 19:27:32,436 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:32,437 INFO L402 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-12-03 19:27:32,437 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:32,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-12-03 19:27:32,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:32,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:32,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:32,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:32,438 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:33,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:33,285 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:33,285 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:33,285 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:33,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:33,286 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:33,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:33,295 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:27:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:33,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:33,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:35,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:35,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 88 [2018-12-03 19:27:35,823 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:35,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-03 19:27:35,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-03 19:27:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-12-03 19:27:35,825 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-12-03 19:27:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:35,891 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-12-03 19:27:35,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-03 19:27:35,891 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-12-03 19:27:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:35,892 INFO L225 Difference]: With dead ends: 48 [2018-12-03 19:27:35,892 INFO L226 Difference]: Without dead ends: 47 [2018-12-03 19:27:35,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-12-03 19:27:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-03 19:27:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-03 19:27:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-03 19:27:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-12-03 19:27:35,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-12-03 19:27:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:35,896 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-12-03 19:27:35,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-03 19:27:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-12-03 19:27:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-03 19:27:35,896 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:35,897 INFO L402 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-12-03 19:27:35,897 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:35,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:35,897 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-12-03 19:27:35,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:35,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:35,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:35,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:35,898 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:36,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:36,656 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:36,656 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:36,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:36,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:36,656 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:36,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:27:36,665 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:27:36,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-12-03 19:27:36,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:36,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:36,710 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:38,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:38,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 90 [2018-12-03 19:27:38,836 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:38,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-03 19:27:38,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-03 19:27:38,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 19:27:38,838 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-12-03 19:27:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:38,906 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-12-03 19:27:38,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-03 19:27:38,907 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-12-03 19:27:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:38,907 INFO L225 Difference]: With dead ends: 49 [2018-12-03 19:27:38,908 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 19:27:38,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-03 19:27:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 19:27:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-03 19:27:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-03 19:27:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-12-03 19:27:38,911 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-12-03 19:27:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:38,911 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-12-03 19:27:38,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-03 19:27:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-12-03 19:27:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-03 19:27:38,912 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:38,912 INFO L402 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-12-03 19:27:38,912 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:38,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-12-03 19:27:38,913 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:38,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:38,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:38,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:38,914 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:39,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:39,730 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:39,730 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:39,730 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:39,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:39,730 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:39,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:27:39,742 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:27:39,770 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:27:39,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:39,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:39,783 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:42,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:42,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2018-12-03 19:27:42,254 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:42,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-03 19:27:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-03 19:27:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-12-03 19:27:42,256 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-12-03 19:27:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:42,704 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-12-03 19:27:42,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-03 19:27:42,705 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-12-03 19:27:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:42,705 INFO L225 Difference]: With dead ends: 50 [2018-12-03 19:27:42,705 INFO L226 Difference]: Without dead ends: 49 [2018-12-03 19:27:42,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-12-03 19:27:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-03 19:27:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-12-03 19:27:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-03 19:27:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-12-03 19:27:42,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-12-03 19:27:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:42,709 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-12-03 19:27:42,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-03 19:27:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-12-03 19:27:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 19:27:42,709 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:42,709 INFO L402 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-12-03 19:27:42,709 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:42,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-12-03 19:27:42,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:42,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:42,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:42,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:42,711 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:43,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:43,621 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:43,621 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:43,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:43,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:43,621 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:43,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:43,630 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:27:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:43,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:43,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:46,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:46,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2018-12-03 19:27:46,178 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:46,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-12-03 19:27:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-12-03 19:27:46,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-12-03 19:27:46,179 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-12-03 19:27:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:46,248 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-12-03 19:27:46,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-03 19:27:46,248 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-12-03 19:27:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:46,249 INFO L225 Difference]: With dead ends: 51 [2018-12-03 19:27:46,249 INFO L226 Difference]: Without dead ends: 50 [2018-12-03 19:27:46,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-12-03 19:27:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-03 19:27:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-03 19:27:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-03 19:27:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-12-03 19:27:46,252 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-12-03 19:27:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:46,252 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-12-03 19:27:46,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-12-03 19:27:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-12-03 19:27:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-03 19:27:46,253 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:46,253 INFO L402 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-12-03 19:27:46,253 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:46,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:46,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-12-03 19:27:46,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:46,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:46,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:46,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:46,255 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:47,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:47,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:47,341 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:47,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:47,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:47,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:47,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:27:47,350 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:27:47,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-12-03 19:27:47,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:47,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:47,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:49,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:49,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2018-12-03 19:27:49,867 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:49,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-03 19:27:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-03 19:27:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 19:27:49,868 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-12-03 19:27:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:49,932 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-12-03 19:27:49,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-03 19:27:49,933 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-12-03 19:27:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:49,934 INFO L225 Difference]: With dead ends: 52 [2018-12-03 19:27:49,934 INFO L226 Difference]: Without dead ends: 51 [2018-12-03 19:27:49,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-12-03 19:27:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-03 19:27:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-12-03 19:27:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-03 19:27:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-12-03 19:27:49,937 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-12-03 19:27:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:49,937 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-12-03 19:27:49,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-03 19:27:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-12-03 19:27:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-03 19:27:49,937 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:49,937 INFO L402 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-12-03 19:27:49,938 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:49,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-12-03 19:27:49,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:49,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:49,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:49,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:49,939 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:51,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:51,117 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:51,118 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:51,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:51,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:51,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:51,127 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:27:51,127 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:27:51,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:27:51,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:51,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:51,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:53,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:53,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2018-12-03 19:27:53,661 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:53,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-03 19:27:53,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-03 19:27:53,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-12-03 19:27:53,662 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-12-03 19:27:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:53,796 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-12-03 19:27:53,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-03 19:27:53,796 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-12-03 19:27:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:53,797 INFO L225 Difference]: With dead ends: 53 [2018-12-03 19:27:53,797 INFO L226 Difference]: Without dead ends: 52 [2018-12-03 19:27:53,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-12-03 19:27:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-03 19:27:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-12-03 19:27:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-03 19:27:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-12-03 19:27:53,801 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-12-03 19:27:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:53,802 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-12-03 19:27:53,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-03 19:27:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-12-03 19:27:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-03 19:27:53,802 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:53,802 INFO L402 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-12-03 19:27:53,803 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:53,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-12-03 19:27:53,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:53,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:53,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:27:53,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:53,804 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:55,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:55,285 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:55,286 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:55,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:55,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:55,286 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:55,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:55,294 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:27:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:55,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:55,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:27:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:58,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:27:58,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2018-12-03 19:27:58,457 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:27:58,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-03 19:27:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-03 19:27:58,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:27:58,459 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-12-03 19:27:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:27:58,541 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-12-03 19:27:58,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-03 19:27:58,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-12-03 19:27:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:27:58,542 INFO L225 Difference]: With dead ends: 54 [2018-12-03 19:27:58,542 INFO L226 Difference]: Without dead ends: 53 [2018-12-03 19:27:58,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:27:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-03 19:27:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-03 19:27:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-03 19:27:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-12-03 19:27:58,546 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-12-03 19:27:58,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:27:58,546 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-12-03 19:27:58,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-03 19:27:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-12-03 19:27:58,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-03 19:27:58,547 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:27:58,547 INFO L402 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-12-03 19:27:58,547 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:27:58,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:27:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-12-03 19:27:58,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:27:58,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:58,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:27:58,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:27:58,548 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:27:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:27:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:59,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:59,666 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:27:59,666 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:27:59,666 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:27:59,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:27:59,667 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:27:59,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:27:59,677 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:27:59,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-12-03 19:27:59,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:27:59,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:27:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:27:59,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:02,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:02,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 100 [2018-12-03 19:28:02,959 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:02,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-03 19:28:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-03 19:28:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:02,961 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-12-03 19:28:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:03,083 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-12-03 19:28:03,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-03 19:28:03,084 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-12-03 19:28:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:03,085 INFO L225 Difference]: With dead ends: 55 [2018-12-03 19:28:03,085 INFO L226 Difference]: Without dead ends: 54 [2018-12-03 19:28:03,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-03 19:28:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-12-03 19:28:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-03 19:28:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-12-03 19:28:03,088 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-12-03 19:28:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:03,088 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-12-03 19:28:03,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-03 19:28:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-12-03 19:28:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 19:28:03,089 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:03,089 INFO L402 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-12-03 19:28:03,089 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:03,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-12-03 19:28:03,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:03,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:03,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:03,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:03,090 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:04,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:04,250 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:04,251 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:04,251 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:04,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:04,251 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:04,259 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:28:04,260 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:28:04,305 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:28:04,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:04,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:04,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:07,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:07,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 100 [2018-12-03 19:28:07,357 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:07,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-03 19:28:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-03 19:28:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:07,358 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-12-03 19:28:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:07,420 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-12-03 19:28:07,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-03 19:28:07,421 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-12-03 19:28:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:07,422 INFO L225 Difference]: With dead ends: 56 [2018-12-03 19:28:07,422 INFO L226 Difference]: Without dead ends: 55 [2018-12-03 19:28:07,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-03 19:28:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-03 19:28:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-03 19:28:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-12-03 19:28:07,425 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-12-03 19:28:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:07,425 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-12-03 19:28:07,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-03 19:28:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-12-03 19:28:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-03 19:28:07,426 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:07,426 INFO L402 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-12-03 19:28:07,426 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:07,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:07,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-12-03 19:28:07,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:07,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:07,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:07,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:07,428 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:08,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:08,527 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:08,527 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:08,528 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:08,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:08,528 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:08,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:08,536 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:28:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:08,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:08,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:11,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:11,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 100 [2018-12-03 19:28:11,693 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:11,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-12-03 19:28:11,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-12-03 19:28:11,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:11,695 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-12-03 19:28:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:11,757 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-12-03 19:28:11,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-03 19:28:11,758 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-12-03 19:28:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:11,758 INFO L225 Difference]: With dead ends: 57 [2018-12-03 19:28:11,759 INFO L226 Difference]: Without dead ends: 56 [2018-12-03 19:28:11,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-03 19:28:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-03 19:28:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-03 19:28:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-12-03 19:28:11,762 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-12-03 19:28:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:11,762 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-12-03 19:28:11,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-12-03 19:28:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-12-03 19:28:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-03 19:28:11,763 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:11,763 INFO L402 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-12-03 19:28:11,763 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:11,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:11,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-12-03 19:28:11,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:11,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:11,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:11,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:11,764 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:12,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:12,910 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:12,910 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:12,910 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:12,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:12,910 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:12,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:28:12,931 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:28:12,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-12-03 19:28:12,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:12,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:12,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:15,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:15,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 100 [2018-12-03 19:28:15,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:15,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-03 19:28:15,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-03 19:28:15,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:15,674 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-12-03 19:28:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:15,745 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-12-03 19:28:15,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-12-03 19:28:15,745 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-12-03 19:28:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:15,746 INFO L225 Difference]: With dead ends: 58 [2018-12-03 19:28:15,746 INFO L226 Difference]: Without dead ends: 57 [2018-12-03 19:28:15,747 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-03 19:28:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-03 19:28:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-03 19:28:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-12-03 19:28:15,749 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-12-03 19:28:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:15,749 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-12-03 19:28:15,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-03 19:28:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-12-03 19:28:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 19:28:15,750 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:15,750 INFO L402 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-12-03 19:28:15,750 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:15,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-12-03 19:28:15,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:15,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:15,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:15,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:15,751 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:17,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:17,162 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:17,162 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:17,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:17,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:17,162 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:17,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:28:17,173 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:28:17,199 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:28:17,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:17,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:17,211 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:19,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:19,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 100 [2018-12-03 19:28:19,942 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:19,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-12-03 19:28:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-12-03 19:28:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:19,943 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-12-03 19:28:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:20,013 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-12-03 19:28:20,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-03 19:28:20,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-12-03 19:28:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:20,014 INFO L225 Difference]: With dead ends: 59 [2018-12-03 19:28:20,014 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 19:28:20,015 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 19:28:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-03 19:28:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-03 19:28:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-12-03 19:28:20,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-12-03 19:28:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:20,018 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-12-03 19:28:20,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-12-03 19:28:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-12-03 19:28:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 19:28:20,019 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:20,019 INFO L402 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-12-03 19:28:20,019 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:20,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:20,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-12-03 19:28:20,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:20,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:20,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:20,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:20,020 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:21,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:21,485 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:21,485 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:21,486 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:21,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:21,486 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:21,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:21,495 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:28:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:21,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:21,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:24,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:24,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 100 [2018-12-03 19:28:24,434 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:24,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-12-03 19:28:24,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-12-03 19:28:24,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:24,435 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-12-03 19:28:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:24,520 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-12-03 19:28:24,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-03 19:28:24,521 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-12-03 19:28:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:24,522 INFO L225 Difference]: With dead ends: 60 [2018-12-03 19:28:24,522 INFO L226 Difference]: Without dead ends: 59 [2018-12-03 19:28:24,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-03 19:28:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-03 19:28:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 19:28:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-12-03 19:28:24,525 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-12-03 19:28:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:24,526 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-12-03 19:28:24,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-12-03 19:28:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-12-03 19:28:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 19:28:24,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:24,526 INFO L402 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-12-03 19:28:24,526 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:24,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-12-03 19:28:24,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:24,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:24,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:24,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:24,527 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:25,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:25,791 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:25,791 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:25,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:25,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:25,791 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:25,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:28:25,801 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:28:25,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-12-03 19:28:25,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:25,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:25,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:29,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:29,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 100 [2018-12-03 19:28:29,026 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:29,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-12-03 19:28:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-12-03 19:28:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:29,027 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-12-03 19:28:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:29,125 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-12-03 19:28:29,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-03 19:28:29,126 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-12-03 19:28:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:29,126 INFO L225 Difference]: With dead ends: 61 [2018-12-03 19:28:29,127 INFO L226 Difference]: Without dead ends: 60 [2018-12-03 19:28:29,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 14 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-03 19:28:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-03 19:28:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-03 19:28:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-12-03 19:28:29,130 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-12-03 19:28:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:29,131 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-12-03 19:28:29,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-12-03 19:28:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-12-03 19:28:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-03 19:28:29,131 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:29,132 INFO L402 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-12-03 19:28:29,132 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:29,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:29,132 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-12-03 19:28:29,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:29,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:29,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:29,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:29,133 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:30,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:30,504 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:30,504 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:30,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:30,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:30,504 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:30,512 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:28:30,512 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:28:30,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:28:30,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:30,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:30,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:33,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:33,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 100 [2018-12-03 19:28:33,724 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:33,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-03 19:28:33,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-03 19:28:33,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:33,726 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-12-03 19:28:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:33,816 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-12-03 19:28:33,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-03 19:28:33,817 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-12-03 19:28:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:33,817 INFO L225 Difference]: With dead ends: 62 [2018-12-03 19:28:33,818 INFO L226 Difference]: Without dead ends: 61 [2018-12-03 19:28:33,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-03 19:28:33,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-03 19:28:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-03 19:28:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-12-03 19:28:33,821 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-12-03 19:28:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:33,821 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-12-03 19:28:33,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-03 19:28:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-12-03 19:28:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-12-03 19:28:33,822 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:33,822 INFO L402 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-12-03 19:28:33,822 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:33,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:33,822 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-12-03 19:28:33,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:33,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:33,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:33,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:33,823 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:35,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:35,098 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:35,098 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:35,098 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:35,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:35,098 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:35,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:35,109 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:28:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:35,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:35,151 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:38,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:38,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 100 [2018-12-03 19:28:38,246 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:38,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-12-03 19:28:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-12-03 19:28:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:38,247 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-12-03 19:28:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:38,335 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-12-03 19:28:38,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-03 19:28:38,335 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-12-03 19:28:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:38,336 INFO L225 Difference]: With dead ends: 63 [2018-12-03 19:28:38,336 INFO L226 Difference]: Without dead ends: 62 [2018-12-03 19:28:38,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 18 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-03 19:28:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-12-03 19:28:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-03 19:28:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-12-03 19:28:38,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-12-03 19:28:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:38,340 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-12-03 19:28:38,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-12-03 19:28:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-12-03 19:28:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-03 19:28:38,341 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:38,341 INFO L402 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-12-03 19:28:38,341 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:38,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-12-03 19:28:38,341 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:38,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:38,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:38,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:38,342 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:39,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:39,968 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:39,968 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:39,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:39,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:39,969 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:39,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:28:39,978 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:28:40,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-12-03 19:28:40,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:40,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:40,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:43,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:43,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 100 [2018-12-03 19:28:43,267 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:43,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-03 19:28:43,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-03 19:28:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:43,270 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-12-03 19:28:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:43,366 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-12-03 19:28:43,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-12-03 19:28:43,366 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-12-03 19:28:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:43,367 INFO L225 Difference]: With dead ends: 64 [2018-12-03 19:28:43,367 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 19:28:43,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 20 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 19:28:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-03 19:28:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-03 19:28:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-12-03 19:28:43,371 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-12-03 19:28:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:43,371 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-12-03 19:28:43,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-03 19:28:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-12-03 19:28:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-03 19:28:43,371 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:43,371 INFO L402 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-12-03 19:28:43,371 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:43,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:43,372 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-12-03 19:28:43,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:43,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:43,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:43,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:43,373 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:45,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:45,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:45,049 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:45,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:45,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:45,050 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:45,058 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:28:45,058 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:28:45,091 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:28:45,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:45,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:45,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:48,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:48,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 100 [2018-12-03 19:28:48,434 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:48,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-12-03 19:28:48,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-12-03 19:28:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:48,435 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-12-03 19:28:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:48,524 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-12-03 19:28:48,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-03 19:28:48,525 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-12-03 19:28:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:48,526 INFO L225 Difference]: With dead ends: 65 [2018-12-03 19:28:48,526 INFO L226 Difference]: Without dead ends: 64 [2018-12-03 19:28:48,527 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 22 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-03 19:28:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-03 19:28:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 19:28:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-12-03 19:28:48,529 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-12-03 19:28:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:48,529 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-12-03 19:28:48,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-12-03 19:28:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-12-03 19:28:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 19:28:48,530 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:48,530 INFO L402 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-12-03 19:28:48,530 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:48,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-12-03 19:28:48,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:48,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:48,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:48,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:48,532 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:50,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:50,189 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:50,190 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:50,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:50,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:50,190 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:50,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:50,198 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:28:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:50,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:50,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:53,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:53,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 100 [2018-12-03 19:28:53,507 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:53,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-03 19:28:53,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-03 19:28:53,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:53,509 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-12-03 19:28:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:53,596 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-12-03 19:28:53,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-03 19:28:53,596 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-12-03 19:28:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:53,597 INFO L225 Difference]: With dead ends: 66 [2018-12-03 19:28:53,597 INFO L226 Difference]: Without dead ends: 65 [2018-12-03 19:28:53,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 24 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-03 19:28:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-12-03 19:28:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-03 19:28:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-12-03 19:28:53,602 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-12-03 19:28:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:53,602 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-12-03 19:28:53,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-03 19:28:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-12-03 19:28:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-03 19:28:53,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:53,603 INFO L402 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-12-03 19:28:53,604 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:53,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-12-03 19:28:53,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:53,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:28:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:53,605 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:28:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:55,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:55,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:28:55,076 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:28:55,076 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:28:55,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:28:55,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:28:55,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:28:55,086 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:28:55,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-12-03 19:28:55,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:28:55,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:28:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:55,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:28:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:28:58,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:28:58,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 100 [2018-12-03 19:28:58,492 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:28:58,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-12-03 19:28:58,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-12-03 19:28:58,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:58,494 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-12-03 19:28:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:28:58,598 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-12-03 19:28:58,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-03 19:28:58,598 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-12-03 19:28:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:28:58,599 INFO L225 Difference]: With dead ends: 67 [2018-12-03 19:28:58,599 INFO L226 Difference]: Without dead ends: 66 [2018-12-03 19:28:58,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 26 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:28:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-03 19:28:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-12-03 19:28:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-03 19:28:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-12-03 19:28:58,602 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-12-03 19:28:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:28:58,603 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-12-03 19:28:58,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-12-03 19:28:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-12-03 19:28:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-03 19:28:58,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:28:58,603 INFO L402 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-12-03 19:28:58,603 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:28:58,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:28:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-12-03 19:28:58,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:28:58,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:58,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:28:58,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:28:58,605 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:28:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:00,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:00,889 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:00,889 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:00,889 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:00,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:00,889 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:00,899 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:29:00,899 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:29:00,934 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:29:00,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:29:00,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:00,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:04,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:04,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 100 [2018-12-03 19:29:04,265 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:04,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-03 19:29:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-03 19:29:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:04,266 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-12-03 19:29:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:04,381 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-12-03 19:29:04,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-12-03 19:29:04,382 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-12-03 19:29:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:04,383 INFO L225 Difference]: With dead ends: 68 [2018-12-03 19:29:04,383 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 19:29:04,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 28 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 19:29:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-03 19:29:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 19:29:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-12-03 19:29:04,387 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-12-03 19:29:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-12-03 19:29:04,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-03 19:29:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-12-03 19:29:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-12-03 19:29:04,388 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:04,388 INFO L402 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-12-03 19:29:04,388 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:04,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-12-03 19:29:04,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:04,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:04,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:29:04,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:04,390 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:05,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:05,902 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:05,903 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:05,903 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:05,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:05,903 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:05,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:29:05,913 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:29:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:05,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:05,975 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:09,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:09,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 100 [2018-12-03 19:29:09,310 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:09,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-12-03 19:29:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-12-03 19:29:09,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:09,311 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-12-03 19:29:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:09,410 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-12-03 19:29:09,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-03 19:29:09,410 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-12-03 19:29:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:09,411 INFO L225 Difference]: With dead ends: 69 [2018-12-03 19:29:09,411 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 19:29:09,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 30 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 19:29:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-03 19:29:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-03 19:29:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-12-03 19:29:09,415 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-12-03 19:29:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:09,415 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-12-03 19:29:09,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-12-03 19:29:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-12-03 19:29:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-03 19:29:09,416 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:09,416 INFO L402 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-12-03 19:29:09,416 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:09,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-12-03 19:29:09,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:09,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:09,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:29:09,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:09,418 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:10,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:10,997 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:10,997 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:10,997 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:10,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:10,997 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:11,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:29:11,006 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:29:11,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-12-03 19:29:11,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:29:11,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:11,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:14,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:14,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 100 [2018-12-03 19:29:14,318 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:14,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-03 19:29:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-03 19:29:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:14,320 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-12-03 19:29:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:14,421 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-12-03 19:29:14,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-12-03 19:29:14,422 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-12-03 19:29:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:14,423 INFO L225 Difference]: With dead ends: 70 [2018-12-03 19:29:14,423 INFO L226 Difference]: Without dead ends: 69 [2018-12-03 19:29:14,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 32 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-03 19:29:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-03 19:29:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-03 19:29:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-12-03 19:29:14,427 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-12-03 19:29:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:14,427 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-12-03 19:29:14,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-03 19:29:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-12-03 19:29:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-03 19:29:14,428 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:14,428 INFO L402 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-12-03 19:29:14,428 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:14,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-12-03 19:29:14,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:14,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:14,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:29:14,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:14,429 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:16,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:16,086 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:16,086 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:16,086 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:16,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:16,086 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:16,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:29:16,097 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:29:16,150 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:29:16,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:29:16,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:16,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:19,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:19,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 100 [2018-12-03 19:29:19,472 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:19,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-12-03 19:29:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-12-03 19:29:19,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:19,473 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-12-03 19:29:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:19,573 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-12-03 19:29:19,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-03 19:29:19,573 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-12-03 19:29:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:19,574 INFO L225 Difference]: With dead ends: 71 [2018-12-03 19:29:19,574 INFO L226 Difference]: Without dead ends: 70 [2018-12-03 19:29:19,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 34 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-03 19:29:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-12-03 19:29:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-03 19:29:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-12-03 19:29:19,578 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-12-03 19:29:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:19,578 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-12-03 19:29:19,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-12-03 19:29:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-12-03 19:29:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-03 19:29:19,579 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:19,579 INFO L402 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-12-03 19:29:19,579 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:19,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-12-03 19:29:19,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:19,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:19,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:29:19,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:19,580 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:21,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:21,261 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:21,261 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:21,261 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:21,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:21,261 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:21,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:29:21,269 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:29:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:21,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:21,324 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:24,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:24,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 100 [2018-12-03 19:29:24,902 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:24,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-03 19:29:24,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-03 19:29:24,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:24,903 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-12-03 19:29:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:25,017 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-12-03 19:29:25,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-12-03 19:29:25,017 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-12-03 19:29:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:25,018 INFO L225 Difference]: With dead ends: 72 [2018-12-03 19:29:25,018 INFO L226 Difference]: Without dead ends: 71 [2018-12-03 19:29:25,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 36 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-03 19:29:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-12-03 19:29:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-03 19:29:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-12-03 19:29:25,022 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-12-03 19:29:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:25,022 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-12-03 19:29:25,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-03 19:29:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-12-03 19:29:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-03 19:29:25,022 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:25,023 INFO L402 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-12-03 19:29:25,023 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:25,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-12-03 19:29:25,023 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:25,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:29:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:25,024 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:27,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:27,488 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:27,489 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:27,489 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:27,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:27,489 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:27,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:29:27,498 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:29:27,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-12-03 19:29:27,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:29:27,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:27,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:30,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:30,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 100 [2018-12-03 19:29:30,991 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:30,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-12-03 19:29:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-12-03 19:29:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:30,993 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-12-03 19:29:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:31,106 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-12-03 19:29:31,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-03 19:29:31,107 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-12-03 19:29:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:31,107 INFO L225 Difference]: With dead ends: 73 [2018-12-03 19:29:31,108 INFO L226 Difference]: Without dead ends: 72 [2018-12-03 19:29:31,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 38 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-03 19:29:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-12-03 19:29:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-03 19:29:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-12-03 19:29:31,111 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-12-03 19:29:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:31,112 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-12-03 19:29:31,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-12-03 19:29:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-12-03 19:29:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-03 19:29:31,112 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:31,113 INFO L402 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-12-03 19:29:31,113 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:31,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-12-03 19:29:31,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:31,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:31,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:29:31,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:31,114 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:33,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:33,075 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:33,076 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:33,076 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:33,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:33,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:33,083 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:29:33,084 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:29:33,122 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:29:33,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:29:33,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:33,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:36,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:36,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 100 [2018-12-03 19:29:36,259 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:36,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-03 19:29:36,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-03 19:29:36,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:36,260 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-12-03 19:29:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:36,412 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-12-03 19:29:36,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-03 19:29:36,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-12-03 19:29:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:36,413 INFO L225 Difference]: With dead ends: 74 [2018-12-03 19:29:36,413 INFO L226 Difference]: Without dead ends: 73 [2018-12-03 19:29:36,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 40 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-03 19:29:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-12-03 19:29:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-03 19:29:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-12-03 19:29:36,417 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-12-03 19:29:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:36,417 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-12-03 19:29:36,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-03 19:29:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-12-03 19:29:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-03 19:29:36,418 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:36,418 INFO L402 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-12-03 19:29:36,418 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:36,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-12-03 19:29:36,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:36,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:36,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:29:36,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:36,419 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:38,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:38,488 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:38,488 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:38,489 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:38,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:38,489 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:38,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:29:38,497 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:29:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:38,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:38,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:43,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:43,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 100 [2018-12-03 19:29:43,821 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:43,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-12-03 19:29:43,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-12-03 19:29:43,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:43,822 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-12-03 19:29:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:44,699 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-12-03 19:29:44,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-03 19:29:44,699 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-12-03 19:29:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:44,700 INFO L225 Difference]: With dead ends: 75 [2018-12-03 19:29:44,700 INFO L226 Difference]: Without dead ends: 74 [2018-12-03 19:29:44,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 42 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-03 19:29:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-12-03 19:29:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-03 19:29:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-12-03 19:29:44,702 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-12-03 19:29:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:44,703 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-12-03 19:29:44,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-12-03 19:29:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-12-03 19:29:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 19:29:44,704 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:44,704 INFO L402 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-12-03 19:29:44,704 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:44,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-12-03 19:29:44,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:44,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:44,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:29:44,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:44,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:46,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:46,943 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:46,943 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:46,943 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:46,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:46,944 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:46,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:29:46,951 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:29:47,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-12-03 19:29:47,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:29:47,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:47,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:50,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:50,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 100 [2018-12-03 19:29:50,434 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:50,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-12-03 19:29:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-12-03 19:29:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:50,436 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-12-03 19:29:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:50,632 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-12-03 19:29:50,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-12-03 19:29:50,633 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-12-03 19:29:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:50,634 INFO L225 Difference]: With dead ends: 76 [2018-12-03 19:29:50,634 INFO L226 Difference]: Without dead ends: 75 [2018-12-03 19:29:50,635 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 44 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-03 19:29:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-12-03 19:29:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-03 19:29:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-12-03 19:29:50,638 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-12-03 19:29:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:50,638 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-12-03 19:29:50,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-12-03 19:29:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-12-03 19:29:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-12-03 19:29:50,639 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:50,639 INFO L402 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-12-03 19:29:50,639 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:50,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:50,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-12-03 19:29:50,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:50,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:50,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:29:50,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:50,640 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:52,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:52,652 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:52,652 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:52,652 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:52,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:52,652 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:52,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:29:52,661 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:29:52,698 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:29:52,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:29:52,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:52,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:29:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:56,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:29:56,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 100 [2018-12-03 19:29:56,236 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:29:56,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-12-03 19:29:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-12-03 19:29:56,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:56,238 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-12-03 19:29:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:29:56,328 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-12-03 19:29:56,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-03 19:29:56,329 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-12-03 19:29:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:29:56,329 INFO L225 Difference]: With dead ends: 77 [2018-12-03 19:29:56,329 INFO L226 Difference]: Without dead ends: 76 [2018-12-03 19:29:56,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 46 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:29:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-03 19:29:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-12-03 19:29:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-03 19:29:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-12-03 19:29:56,333 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-12-03 19:29:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:29:56,334 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-12-03 19:29:56,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-12-03 19:29:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-12-03 19:29:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-03 19:29:56,334 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:29:56,334 INFO L402 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-12-03 19:29:56,335 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:29:56,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:29:56,335 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-12-03 19:29:56,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:29:56,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:56,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:29:56,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:29:56,336 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:29:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:58,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:58,281 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:29:58,281 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:29:58,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:29:58,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:29:58,281 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:29:58,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:29:58,290 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:29:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:29:58,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:29:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:29:58,349 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:01,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:01,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 100 [2018-12-03 19:30:01,793 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:01,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-03 19:30:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-03 19:30:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:01,795 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-12-03 19:30:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:01,947 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-12-03 19:30:01,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-12-03 19:30:01,947 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-12-03 19:30:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:01,948 INFO L225 Difference]: With dead ends: 78 [2018-12-03 19:30:01,948 INFO L226 Difference]: Without dead ends: 77 [2018-12-03 19:30:01,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 48 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-03 19:30:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-12-03 19:30:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-03 19:30:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-12-03 19:30:01,952 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-12-03 19:30:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:01,952 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-12-03 19:30:01,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-03 19:30:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-12-03 19:30:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-12-03 19:30:01,953 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:01,953 INFO L402 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-12-03 19:30:01,953 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:01,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-12-03 19:30:01,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:01,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:01,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:30:01,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:01,954 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:04,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:04,268 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:04,268 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:04,268 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:04,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:04,269 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:04,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:30:04,277 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:30:04,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2018-12-03 19:30:04,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:30:04,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:04,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:07,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:07,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 100 [2018-12-03 19:30:07,846 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:07,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-12-03 19:30:07,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-12-03 19:30:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:07,848 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-12-03 19:30:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:07,967 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-12-03 19:30:07,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-03 19:30:07,968 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-12-03 19:30:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:07,968 INFO L225 Difference]: With dead ends: 79 [2018-12-03 19:30:07,969 INFO L226 Difference]: Without dead ends: 78 [2018-12-03 19:30:07,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 50 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-03 19:30:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-12-03 19:30:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-03 19:30:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-12-03 19:30:07,972 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-12-03 19:30:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:07,972 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-12-03 19:30:07,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-12-03 19:30:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-12-03 19:30:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-03 19:30:07,973 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:07,973 INFO L402 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-12-03 19:30:07,973 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:07,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-12-03 19:30:07,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:07,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:07,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:30:07,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:07,974 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:10,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:10,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:10,341 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:10,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:10,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:10,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:10,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:30:10,349 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:30:10,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:30:10,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:30:10,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:10,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:13,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:13,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 100 [2018-12-03 19:30:13,648 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:13,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-12-03 19:30:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-12-03 19:30:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:13,649 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-12-03 19:30:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:13,846 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-12-03 19:30:13,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-12-03 19:30:13,846 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-12-03 19:30:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:13,847 INFO L225 Difference]: With dead ends: 80 [2018-12-03 19:30:13,847 INFO L226 Difference]: Without dead ends: 79 [2018-12-03 19:30:13,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 52 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2574 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-03 19:30:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-12-03 19:30:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 19:30:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-12-03 19:30:13,849 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-12-03 19:30:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:13,849 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-12-03 19:30:13,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-12-03 19:30:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-12-03 19:30:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-03 19:30:13,850 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:13,850 INFO L402 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-12-03 19:30:13,850 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:13,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:13,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-12-03 19:30:13,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:13,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:13,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:30:13,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:13,851 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:16,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:16,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:16,093 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:16,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:16,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:16,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:16,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:30:16,102 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:30:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:16,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:16,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:19,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:19,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 100 [2018-12-03 19:30:19,698 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:19,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-12-03 19:30:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-12-03 19:30:19,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:19,699 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-12-03 19:30:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:19,800 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-12-03 19:30:19,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-03 19:30:19,800 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-12-03 19:30:19,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:19,801 INFO L225 Difference]: With dead ends: 81 [2018-12-03 19:30:19,801 INFO L226 Difference]: Without dead ends: 80 [2018-12-03 19:30:19,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 54 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-03 19:30:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-12-03 19:30:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-03 19:30:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-12-03 19:30:19,804 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-12-03 19:30:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:19,804 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-12-03 19:30:19,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-12-03 19:30:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-12-03 19:30:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-03 19:30:19,804 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:19,804 INFO L402 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-12-03 19:30:19,805 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:19,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-12-03 19:30:19,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:19,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:19,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:30:19,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:19,806 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:22,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:22,193 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:22,194 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:22,194 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:22,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:22,194 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:22,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:30:22,204 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:30:22,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-12-03 19:30:22,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:30:22,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:22,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:25,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:25,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 100 [2018-12-03 19:30:25,820 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:25,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-03 19:30:25,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-03 19:30:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:25,822 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-12-03 19:30:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:27,275 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-12-03 19:30:27,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-12-03 19:30:27,276 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-12-03 19:30:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:27,277 INFO L225 Difference]: With dead ends: 82 [2018-12-03 19:30:27,277 INFO L226 Difference]: Without dead ends: 81 [2018-12-03 19:30:27,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 56 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-03 19:30:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-12-03 19:30:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-12-03 19:30:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-12-03 19:30:27,281 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-12-03 19:30:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:27,281 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-12-03 19:30:27,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-03 19:30:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-12-03 19:30:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-03 19:30:27,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:27,282 INFO L402 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-12-03 19:30:27,282 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:27,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:27,283 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-12-03 19:30:27,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:27,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:27,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:30:27,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:27,284 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:29,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:29,810 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:29,810 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:29,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:29,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:29,811 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:29,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:30:29,819 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:30:29,860 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:30:29,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:30:29,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:29,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:33,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:33,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 100 [2018-12-03 19:30:33,126 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:33,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-12-03 19:30:33,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-12-03 19:30:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:33,128 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-12-03 19:30:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:33,291 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-12-03 19:30:33,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-03 19:30:33,291 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-12-03 19:30:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:33,292 INFO L225 Difference]: With dead ends: 83 [2018-12-03 19:30:33,292 INFO L226 Difference]: Without dead ends: 82 [2018-12-03 19:30:33,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 58 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-03 19:30:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-12-03 19:30:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-03 19:30:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-12-03 19:30:33,296 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-12-03 19:30:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:33,296 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-12-03 19:30:33,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-12-03 19:30:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-12-03 19:30:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-03 19:30:33,297 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:33,297 INFO L402 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-12-03 19:30:33,297 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:33,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-12-03 19:30:33,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:33,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:33,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:30:33,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:33,298 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:35,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:35,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:35,906 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:35,906 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:35,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:35,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:35,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:30:35,914 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:30:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:35,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:35,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:39,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:39,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 100 [2018-12-03 19:30:39,255 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:39,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-12-03 19:30:39,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-12-03 19:30:39,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:39,257 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-12-03 19:30:39,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:39,456 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-12-03 19:30:39,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-12-03 19:30:39,456 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-12-03 19:30:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:39,457 INFO L225 Difference]: With dead ends: 84 [2018-12-03 19:30:39,457 INFO L226 Difference]: Without dead ends: 83 [2018-12-03 19:30:39,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 60 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-03 19:30:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-12-03 19:30:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-03 19:30:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-12-03 19:30:39,459 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-12-03 19:30:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:39,459 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-12-03 19:30:39,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-12-03 19:30:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-12-03 19:30:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-03 19:30:39,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:39,460 INFO L402 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-12-03 19:30:39,460 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:39,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-12-03 19:30:39,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:39,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:39,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:30:39,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:39,461 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:41,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:41,820 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:41,820 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:41,821 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:41,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:41,821 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:41,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:30:41,831 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:30:41,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-12-03 19:30:41,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:30:41,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:41,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:45,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:45,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 100 [2018-12-03 19:30:45,577 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:45,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-12-03 19:30:45,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-12-03 19:30:45,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:45,578 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-12-03 19:30:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:45,686 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-12-03 19:30:45,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-03 19:30:45,687 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-12-03 19:30:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:45,688 INFO L225 Difference]: With dead ends: 85 [2018-12-03 19:30:45,688 INFO L226 Difference]: Without dead ends: 84 [2018-12-03 19:30:45,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 62 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-12-03 19:30:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-12-03 19:30:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-03 19:30:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-12-03 19:30:45,690 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-12-03 19:30:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:45,690 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-12-03 19:30:45,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-12-03 19:30:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-12-03 19:30:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-03 19:30:45,691 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:45,691 INFO L402 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-12-03 19:30:45,691 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:45,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-12-03 19:30:45,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:45,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:45,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:30:45,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:45,692 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:48,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:48,262 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:48,262 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:48,262 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:48,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:48,262 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:48,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:30:48,271 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:30:48,317 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:30:48,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:30:48,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:48,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:52,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:52,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 100 [2018-12-03 19:30:52,133 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:52,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-03 19:30:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-03 19:30:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:52,134 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-12-03 19:30:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:52,244 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-12-03 19:30:52,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-12-03 19:30:52,244 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-12-03 19:30:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:52,245 INFO L225 Difference]: With dead ends: 86 [2018-12-03 19:30:52,245 INFO L226 Difference]: Without dead ends: 85 [2018-12-03 19:30:52,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 64 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-03 19:30:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-12-03 19:30:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-12-03 19:30:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-12-03 19:30:52,248 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-12-03 19:30:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:52,248 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-12-03 19:30:52,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-03 19:30:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-12-03 19:30:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-12-03 19:30:52,248 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:52,249 INFO L402 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-12-03 19:30:52,249 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:52,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-12-03 19:30:52,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:52,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:52,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:30:52,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:52,250 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:55,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:55,253 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:30:55,253 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:30:55,253 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:30:55,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:30:55,253 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:30:55,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:30:55,262 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:30:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:30:55,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:30:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:55,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:30:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:30:58,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:30:58,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 100 [2018-12-03 19:30:58,636 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:30:58,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-12-03 19:30:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-12-03 19:30:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:58,637 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-12-03 19:30:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:30:58,851 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-12-03 19:30:58,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-03 19:30:58,851 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-12-03 19:30:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:30:58,852 INFO L225 Difference]: With dead ends: 87 [2018-12-03 19:30:58,852 INFO L226 Difference]: Without dead ends: 86 [2018-12-03 19:30:58,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 83 SyntacticMatches, 66 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:30:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-03 19:30:58,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-12-03 19:30:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-03 19:30:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-12-03 19:30:58,855 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-12-03 19:30:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:30:58,855 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-12-03 19:30:58,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-12-03 19:30:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-12-03 19:30:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-03 19:30:58,856 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:30:58,856 INFO L402 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-12-03 19:30:58,856 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:30:58,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:30:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-12-03 19:30:58,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:30:58,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:58,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:30:58,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:30:58,857 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:30:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:01,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:01,739 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:01,739 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:01,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:01,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:01,740 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:01,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:31:01,748 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:31:01,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-12-03 19:31:01,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:31:01,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:01,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:06,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:06,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 100 [2018-12-03 19:31:06,080 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:06,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-03 19:31:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-03 19:31:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:06,081 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-12-03 19:31:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:06,243 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-12-03 19:31:06,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-12-03 19:31:06,244 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-12-03 19:31:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:06,245 INFO L225 Difference]: With dead ends: 88 [2018-12-03 19:31:06,245 INFO L226 Difference]: Without dead ends: 87 [2018-12-03 19:31:06,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 84 SyntacticMatches, 68 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3366 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-12-03 19:31:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-12-03 19:31:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-03 19:31:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-12-03 19:31:06,248 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-12-03 19:31:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:06,248 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-12-03 19:31:06,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-03 19:31:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-12-03 19:31:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-12-03 19:31:06,248 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:06,248 INFO L402 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-12-03 19:31:06,249 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:06,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-12-03 19:31:06,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:06,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:06,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:31:06,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:06,250 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:08,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:08,781 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:08,781 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:08,781 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:08,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:08,781 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:08,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:31:08,790 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:31:08,836 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:31:08,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:31:08,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:08,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:12,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:12,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 100 [2018-12-03 19:31:12,491 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:12,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-12-03 19:31:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-12-03 19:31:12,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:12,493 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-12-03 19:31:12,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:12,753 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-12-03 19:31:12,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-03 19:31:12,754 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-12-03 19:31:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:12,755 INFO L225 Difference]: With dead ends: 89 [2018-12-03 19:31:12,755 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 19:31:12,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 85 SyntacticMatches, 70 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3465 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 19:31:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-12-03 19:31:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-03 19:31:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-12-03 19:31:12,759 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-12-03 19:31:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:12,759 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-12-03 19:31:12,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-12-03 19:31:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-12-03 19:31:12,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-03 19:31:12,760 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:12,760 INFO L402 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-12-03 19:31:12,760 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:12,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:12,761 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-12-03 19:31:12,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:12,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:12,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:31:12,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:12,762 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:15,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:15,596 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:15,597 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:15,597 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:15,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:15,597 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:15,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:31:15,607 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:31:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:15,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:15,675 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:19,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:19,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 100 [2018-12-03 19:31:19,017 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:19,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-03 19:31:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-03 19:31:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:19,019 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-12-03 19:31:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:19,197 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-12-03 19:31:19,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-12-03 19:31:19,197 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-12-03 19:31:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:19,198 INFO L225 Difference]: With dead ends: 90 [2018-12-03 19:31:19,198 INFO L226 Difference]: Without dead ends: 89 [2018-12-03 19:31:19,199 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 86 SyntacticMatches, 72 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-03 19:31:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-12-03 19:31:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 19:31:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-12-03 19:31:19,202 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-12-03 19:31:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:19,203 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-12-03 19:31:19,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-03 19:31:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-12-03 19:31:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-03 19:31:19,203 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:19,203 INFO L402 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-12-03 19:31:19,204 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:19,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:19,204 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-12-03 19:31:19,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:19,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:19,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:31:19,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:19,205 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:22,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:22,099 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:22,099 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:22,099 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:22,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:22,099 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:22,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:31:22,110 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:31:22,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-12-03 19:31:22,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:31:22,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:22,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:25,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:25,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 100 [2018-12-03 19:31:25,775 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:25,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-12-03 19:31:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-12-03 19:31:25,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:25,777 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-12-03 19:31:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:25,931 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-12-03 19:31:25,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-03 19:31:25,932 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-12-03 19:31:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:25,933 INFO L225 Difference]: With dead ends: 91 [2018-12-03 19:31:25,933 INFO L226 Difference]: Without dead ends: 90 [2018-12-03 19:31:25,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 87 SyntacticMatches, 74 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-03 19:31:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-12-03 19:31:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-12-03 19:31:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-12-03 19:31:25,936 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-12-03 19:31:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:25,936 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-12-03 19:31:25,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-12-03 19:31:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-12-03 19:31:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-03 19:31:25,937 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:25,937 INFO L402 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-12-03 19:31:25,937 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:25,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-12-03 19:31:25,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:25,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:25,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:31:25,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:25,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:28,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:28,658 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:28,658 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:28,658 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:28,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:28,658 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:28,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:31:28,667 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:31:28,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:31:28,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:31:28,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:28,739 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:32,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:32,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 100 [2018-12-03 19:31:32,465 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:32,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-12-03 19:31:32,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-12-03 19:31:32,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:32,467 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-12-03 19:31:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:32,597 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-12-03 19:31:32,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-12-03 19:31:32,597 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-12-03 19:31:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:32,598 INFO L225 Difference]: With dead ends: 92 [2018-12-03 19:31:32,598 INFO L226 Difference]: Without dead ends: 91 [2018-12-03 19:31:32,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 88 SyntacticMatches, 76 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-03 19:31:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-12-03 19:31:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-03 19:31:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-12-03 19:31:32,602 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-12-03 19:31:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:32,602 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-12-03 19:31:32,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-12-03 19:31:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-12-03 19:31:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-12-03 19:31:32,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:32,603 INFO L402 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-12-03 19:31:32,603 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:32,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-12-03 19:31:32,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:32,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:32,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:31:32,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:32,604 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:35,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:35,333 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:35,333 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:35,333 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:35,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:35,333 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:35,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:31:35,342 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:31:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:35,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:35,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:39,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:39,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 100 [2018-12-03 19:31:39,076 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:39,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-12-03 19:31:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-12-03 19:31:39,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:39,077 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-12-03 19:31:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:39,270 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-12-03 19:31:39,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-03 19:31:39,271 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-12-03 19:31:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:39,271 INFO L225 Difference]: With dead ends: 93 [2018-12-03 19:31:39,272 INFO L226 Difference]: Without dead ends: 92 [2018-12-03 19:31:39,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 89 SyntacticMatches, 78 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-03 19:31:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-12-03 19:31:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-03 19:31:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-12-03 19:31:39,276 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-12-03 19:31:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:39,276 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-12-03 19:31:39,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-12-03 19:31:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-12-03 19:31:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-03 19:31:39,277 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:39,277 INFO L402 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-12-03 19:31:39,277 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:39,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-12-03 19:31:39,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:39,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:39,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:31:39,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:39,278 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:42,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:42,435 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:42,436 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:42,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:42,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:42,436 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:42,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:31:42,446 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:31:42,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-12-03 19:31:42,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:31:42,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:42,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:45,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:45,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 100 [2018-12-03 19:31:45,889 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:45,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-03 19:31:45,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-03 19:31:45,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:45,891 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-12-03 19:31:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:46,173 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-12-03 19:31:46,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-12-03 19:31:46,173 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-12-03 19:31:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:46,174 INFO L225 Difference]: With dead ends: 94 [2018-12-03 19:31:46,174 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 19:31:46,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 80 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:46,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 19:31:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-12-03 19:31:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-03 19:31:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-12-03 19:31:46,176 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-12-03 19:31:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:46,176 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-12-03 19:31:46,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-03 19:31:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-12-03 19:31:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-03 19:31:46,177 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:46,177 INFO L402 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-12-03 19:31:46,177 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:46,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-12-03 19:31:46,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:46,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:46,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:31:46,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:46,178 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:49,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:49,032 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:49,032 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:49,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:49,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:49,032 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:49,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:31:49,041 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:31:49,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:31:49,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:31:49,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:49,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:52,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:52,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 100 [2018-12-03 19:31:52,750 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:52,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-12-03 19:31:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-12-03 19:31:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:52,751 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-12-03 19:31:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:52,933 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-12-03 19:31:52,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-03 19:31:52,934 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-12-03 19:31:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:52,934 INFO L225 Difference]: With dead ends: 95 [2018-12-03 19:31:52,935 INFO L226 Difference]: Without dead ends: 94 [2018-12-03 19:31:52,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 82 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4059 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-12-03 19:31:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-12-03 19:31:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-03 19:31:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-12-03 19:31:52,938 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-12-03 19:31:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:52,938 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-12-03 19:31:52,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-12-03 19:31:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-12-03 19:31:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-03 19:31:52,938 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:52,938 INFO L402 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-12-03 19:31:52,939 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:52,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:52,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-12-03 19:31:52,939 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:52,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:52,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:31:52,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:52,940 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:55,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:55,897 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:31:55,897 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:31:55,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:31:55,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:31:55,897 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:31:55,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:31:55,907 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:31:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:31:55,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:31:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:55,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:31:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:31:59,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:31:59,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 100 [2018-12-03 19:31:59,739 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:31:59,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-12-03 19:31:59,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-12-03 19:31:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:59,740 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-12-03 19:31:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:31:59,931 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-12-03 19:31:59,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-12-03 19:31:59,932 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-12-03 19:31:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:31:59,932 INFO L225 Difference]: With dead ends: 96 [2018-12-03 19:31:59,933 INFO L226 Difference]: Without dead ends: 95 [2018-12-03 19:31:59,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 92 SyntacticMatches, 84 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:31:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-03 19:31:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-12-03 19:31:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-12-03 19:31:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-12-03 19:31:59,936 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-12-03 19:31:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:31:59,936 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-12-03 19:31:59,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-12-03 19:31:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-12-03 19:31:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-12-03 19:31:59,937 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:31:59,937 INFO L402 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-12-03 19:31:59,937 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:31:59,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:31:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-12-03 19:31:59,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:31:59,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:59,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:31:59,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:31:59,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:31:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:03,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:03,211 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:03,211 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:03,211 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:03,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:03,211 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:03,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:32:03,219 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:32:03,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-12-03 19:32:03,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:32:03,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:03,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:07,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:07,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 100 [2018-12-03 19:32:07,035 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:07,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-12-03 19:32:07,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-12-03 19:32:07,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:07,036 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-12-03 19:32:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:07,237 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-12-03 19:32:07,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-03 19:32:07,237 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-12-03 19:32:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:07,238 INFO L225 Difference]: With dead ends: 97 [2018-12-03 19:32:07,238 INFO L226 Difference]: Without dead ends: 96 [2018-12-03 19:32:07,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 93 SyntacticMatches, 86 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-03 19:32:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-12-03 19:32:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-03 19:32:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-12-03 19:32:07,241 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-12-03 19:32:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:07,241 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-12-03 19:32:07,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-12-03 19:32:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-12-03 19:32:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-03 19:32:07,242 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:07,242 INFO L402 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-12-03 19:32:07,242 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:07,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:07,242 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-12-03 19:32:07,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:07,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:07,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:32:07,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:07,243 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:10,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:10,297 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:10,297 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:10,297 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:10,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:10,297 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:10,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:32:10,305 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:32:10,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:32:10,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:32:10,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:10,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:14,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:14,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 100 [2018-12-03 19:32:14,066 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:14,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-03 19:32:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-03 19:32:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:14,068 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-12-03 19:32:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:14,278 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-12-03 19:32:14,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-12-03 19:32:14,278 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-12-03 19:32:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:14,279 INFO L225 Difference]: With dead ends: 98 [2018-12-03 19:32:14,280 INFO L226 Difference]: Without dead ends: 97 [2018-12-03 19:32:14,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 94 SyntacticMatches, 88 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4356 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-03 19:32:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-12-03 19:32:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-03 19:32:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-12-03 19:32:14,283 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-12-03 19:32:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:14,284 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-12-03 19:32:14,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-03 19:32:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-12-03 19:32:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-03 19:32:14,284 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:14,285 INFO L402 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-12-03 19:32:14,285 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:14,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-12-03 19:32:14,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:14,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:14,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:32:14,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:14,286 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:17,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:17,662 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:17,662 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:17,662 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:17,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:17,662 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:17,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:32:17,671 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:32:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:17,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:17,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:21,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:21,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 100 [2018-12-03 19:32:21,152 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:21,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-12-03 19:32:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-12-03 19:32:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:21,154 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-12-03 19:32:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:21,382 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-12-03 19:32:21,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-03 19:32:21,382 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-12-03 19:32:21,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:21,383 INFO L225 Difference]: With dead ends: 99 [2018-12-03 19:32:21,383 INFO L226 Difference]: Without dead ends: 98 [2018-12-03 19:32:21,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 95 SyntacticMatches, 90 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-03 19:32:21,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-12-03 19:32:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-12-03 19:32:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-12-03 19:32:21,386 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-12-03 19:32:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:21,387 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-12-03 19:32:21,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-12-03 19:32:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-12-03 19:32:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-03 19:32:21,387 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:21,387 INFO L402 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-12-03 19:32:21,387 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:21,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-12-03 19:32:21,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:21,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:21,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:32:21,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:21,388 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:24,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:24,762 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:24,762 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:24,762 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:24,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:24,762 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:24,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:32:24,772 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:32:24,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2018-12-03 19:32:24,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:32:24,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:24,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:28,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:28,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 100 [2018-12-03 19:32:28,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:28,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-12-03 19:32:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-12-03 19:32:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:28,658 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-12-03 19:32:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:28,795 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-12-03 19:32:28,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-12-03 19:32:28,796 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-12-03 19:32:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:28,796 INFO L225 Difference]: With dead ends: 100 [2018-12-03 19:32:28,797 INFO L226 Difference]: Without dead ends: 99 [2018-12-03 19:32:28,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 96 SyntacticMatches, 92 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-03 19:32:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-12-03 19:32:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-03 19:32:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-12-03 19:32:28,800 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-12-03 19:32:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:28,801 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-12-03 19:32:28,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-12-03 19:32:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-12-03 19:32:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-03 19:32:28,801 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:28,801 INFO L402 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-12-03 19:32:28,801 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:28,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:28,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-12-03 19:32:28,802 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:28,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:28,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:32:28,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:28,803 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:32,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:32,394 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:32,394 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:32,394 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:32,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:32,394 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:32,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:32:32,403 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:32:32,457 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:32:32,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:32:32,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:32,479 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:35,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:35,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 100 [2018-12-03 19:32:35,948 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:35,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-12-03 19:32:35,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-12-03 19:32:35,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:35,950 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-12-03 19:32:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:36,174 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-12-03 19:32:36,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-12-03 19:32:36,175 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-12-03 19:32:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:36,176 INFO L225 Difference]: With dead ends: 101 [2018-12-03 19:32:36,176 INFO L226 Difference]: Without dead ends: 100 [2018-12-03 19:32:36,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 97 SyntacticMatches, 94 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4653 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-03 19:32:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-12-03 19:32:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-12-03 19:32:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-12-03 19:32:36,179 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-12-03 19:32:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:36,179 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-12-03 19:32:36,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-12-03 19:32:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-12-03 19:32:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-03 19:32:36,180 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:36,180 INFO L402 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-12-03 19:32:36,180 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:36,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-12-03 19:32:36,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:36,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:36,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:32:36,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:36,182 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:39,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:39,790 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:39,790 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:39,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:39,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:39,790 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:39,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:32:39,799 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:32:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:39,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:39,872 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:43,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:43,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 100 [2018-12-03 19:32:43,582 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:43,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-03 19:32:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-03 19:32:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:43,583 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-12-03 19:32:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:43,782 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-12-03 19:32:43,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-12-03 19:32:43,783 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-12-03 19:32:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:43,784 INFO L225 Difference]: With dead ends: 102 [2018-12-03 19:32:43,784 INFO L226 Difference]: Without dead ends: 101 [2018-12-03 19:32:43,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 96 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:43,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-12-03 19:32:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-12-03 19:32:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-12-03 19:32:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-12-03 19:32:43,788 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-12-03 19:32:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:43,788 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-12-03 19:32:43,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-03 19:32:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-12-03 19:32:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-12-03 19:32:43,788 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:43,789 INFO L402 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-12-03 19:32:43,789 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:43,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-12-03 19:32:43,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:43,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:43,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:32:43,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:43,790 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:47,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:47,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:47,178 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:47,179 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:47,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:47,179 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:47,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 19:32:47,188 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 19:32:47,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-12-03 19:32:47,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:32:47,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:47,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:51,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:51,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 100 [2018-12-03 19:32:51,093 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:51,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-12-03 19:32:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-12-03 19:32:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:51,094 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-12-03 19:32:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:51,325 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-12-03 19:32:51,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-03 19:32:51,325 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-12-03 19:32:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:51,326 INFO L225 Difference]: With dead ends: 103 [2018-12-03 19:32:51,326 INFO L226 Difference]: Without dead ends: 102 [2018-12-03 19:32:51,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 99 SyntacticMatches, 98 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-12-03 19:32:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-12-03 19:32:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-12-03 19:32:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-12-03 19:32:51,330 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-12-03 19:32:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:51,330 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-12-03 19:32:51,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-12-03 19:32:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-12-03 19:32:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-03 19:32:51,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:51,331 INFO L402 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-12-03 19:32:51,331 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:51,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:51,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-12-03 19:32:51,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:51,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:51,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:32:51,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:51,332 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:32:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:55,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:55,033 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:32:55,033 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:32:55,033 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:32:55,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:32:55,033 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:32:55,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 19:32:55,042 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 19:32:55,096 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 19:32:55,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 19:32:55,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:32:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:55,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:32:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:32:58,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:32:58,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 100 [2018-12-03 19:32:58,821 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:32:58,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-12-03 19:32:58,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-12-03 19:32:58,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:58,822 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-12-03 19:32:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:32:58,961 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-12-03 19:32:58,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-12-03 19:32:58,961 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-12-03 19:32:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:32:58,962 INFO L225 Difference]: With dead ends: 104 [2018-12-03 19:32:58,962 INFO L226 Difference]: Without dead ends: 103 [2018-12-03 19:32:58,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 100 SyntacticMatches, 100 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-03 19:32:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-03 19:32:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-12-03 19:32:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-12-03 19:32:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-12-03 19:32:58,967 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-12-03 19:32:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:32:58,967 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-12-03 19:32:58,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-12-03 19:32:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-12-03 19:32:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-12-03 19:32:58,968 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:32:58,968 INFO L402 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-12-03 19:32:58,968 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:32:58,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:32:58,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-12-03 19:32:58,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:32:58,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:58,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 19:32:58,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:32:58,969 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:32:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:33:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:33:04,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:33:04,173 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 19:33:04,173 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 19:33:04,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 19:33:04,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 19:33:04,174 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-03 19:33:04,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:33:04,186 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 19:33:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:33:04,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 19:33:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:33:04,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 19:33:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:33:04,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 19:33:04,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 101 [2018-12-03 19:33:04,697 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 19:33:04,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-12-03 19:33:04,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-12-03 19:33:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-12-03 19:33:04,698 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-12-03 19:33:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:33:10,998 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-12-03 19:33:10,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-03 19:33:10,998 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-12-03 19:33:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:33:10,999 INFO L225 Difference]: With dead ends: 105 [2018-12-03 19:33:11,000 INFO L226 Difference]: Without dead ends: 104 [2018-12-03 19:33:11,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-12-03 19:33:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-03 19:33:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-12-03 19:33:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-03 19:33:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-12-03 19:33:11,007 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-12-03 19:33:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:33:11,007 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-12-03 19:33:11,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-12-03 19:33:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-12-03 19:33:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-03 19:33:11,008 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 19:33:11,008 INFO L402 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-12-03 19:33:11,008 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-12-03 19:33:11,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 19:33:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-12-03 19:33:11,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 19:33:11,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:33:11,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 19:33:11,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 19:33:11,010 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 19:33:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 19:33:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 19:33:15,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 19:33:15,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-12-03 19:33:15,493 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 19:33:15,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-03 19:33:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-03 19:33:15,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 19:33:15,494 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-12-03 19:33:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 19:33:15,666 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-12-03 19:33:15,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-12-03 19:33:15,666 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-12-03 19:33:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 19:33:15,666 INFO L225 Difference]: With dead ends: 104 [2018-12-03 19:33:15,667 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 19:33:15,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-12-03 19:33:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 19:33:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 19:33:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 19:33:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 19:33:15,668 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-12-03 19:33:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 19:33:15,668 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 19:33:15,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-03 19:33:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 19:33:15,669 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 19:33:15,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 19:33:15,832 WARN L180 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2018-12-03 19:33:17,698 WARN L180 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 610 [2018-12-03 19:33:17,706 INFO L448 ceAbstractionStarter]: For program point mainENTRY(lines 17 31) no Hoare annotation was computed. [2018-12-03 19:33:17,706 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 17 31) no Hoare annotation was computed. [2018-12-03 19:33:17,706 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 17 31) no Hoare annotation was computed. [2018-12-03 19:33:17,709 INFO L444 ceAbstractionStarter]: At program point L24-1(lines 24 27) the Hoare annotation is: (or (and (<= main_x 49) (<= main_y 49) (<= 49 main_x) (<= 49 main_y)) (and (<= 8 main_y) (<= main_y 8) (<= main_x 8) (<= 8 main_x)) (and (<= 99 main_x) (<= main_y 99) (<= 99 main_y) (<= main_x 99)) (and (<= 42 main_x) (<= main_y 42) (<= main_x 42) (<= 42 main_y)) (and (<= 59 main_x) (<= 59 main_y) (<= main_y 59) (<= main_x 59)) (and (<= 9 main_y) (<= 9 main_x) (<= main_x 9) (<= main_y 9)) (and (<= 55 main_y) (<= main_y 55) (<= 55 main_x) (<= main_x 55)) (and (<= 74 main_x) (<= main_x 74) (<= 74 main_y) (<= main_y 74)) (and (<= main_x 97) (<= 97 main_y) (<= main_y 97) (<= 97 main_x)) (and (<= 12 main_x) (<= 12 main_y) (<= main_y 12) (<= main_x 12)) (and (<= main_x 65) (<= main_y 65) (<= 65 main_x) (<= 65 main_y)) (and (<= 32 main_x) (<= main_x 32) (<= 32 main_y) (<= main_y 32)) (and (<= main_y 73) (<= main_x 73) (<= 73 main_x) (<= 73 main_y)) (and (<= 6 main_x) (<= main_x 6) (<= 6 main_y) (<= main_y 6)) (and (<= 14 main_x) (<= 14 main_y) (<= main_y 14) (<= main_x 14)) (and (<= main_x 0) (<= 0 main_y) (<= 0 main_x) (<= main_y 0)) (and (<= main_y 44) (<= main_x 44) (<= 44 main_y) (<= 44 main_x)) (and (<= 38 main_x) (<= 38 main_y) (<= main_y 38) (<= main_x 38)) (and (<= 43 main_x) (<= main_x 43) (<= main_y 43) (<= 43 main_y)) (and (<= 21 main_y) (<= 21 main_x) (<= main_x 21) (<= main_y 21)) (and (<= 94 main_x) (<= 94 main_y) (<= main_x 94) (<= main_y 94)) (and (<= 52 main_x) (<= 52 main_y) (<= main_y 52) (<= main_x 52)) (and (<= main_y 46) (<= 46 main_x) (<= main_x 46) (<= 46 main_y)) (and (<= main_x 18) (<= 18 main_y) (<= 18 main_x) (<= main_y 18)) (and (<= 61 main_y) (<= main_x 61) (<= main_y 61) (<= 61 main_x)) (<= 101 main_x) (and (<= 88 main_y) (<= main_y 88) (<= 88 main_x) (<= main_x 88)) (and (<= 80 main_y) (<= main_x 80) (<= main_y 80) (<= 80 main_x)) (and (<= main_x 92) (<= 92 main_y) (<= main_y 92) (<= 92 main_x)) (and (<= 87 main_x) (<= main_x 87) (<= 87 main_y) (<= main_y 87)) (and (<= 35 main_y) (<= main_y 35) (<= main_x 35) (<= 35 main_x)) (and (<= 85 main_x) (<= main_x 85) (<= 85 main_y) (<= main_y 85)) (and (<= 63 main_x) (<= 63 main_y) (<= main_y 63) (<= main_x 63)) (and (<= 15 main_y) (<= main_y 15) (<= 15 main_x) (<= main_x 15)) (and (<= main_y 64) (<= 64 main_x) (<= main_x 64) (<= 64 main_y)) (and (<= 47 main_x) (<= 47 main_y) (<= main_y 47) (<= main_x 47)) (and (<= 51 main_y) (<= main_x 51) (<= 51 main_x) (<= main_y 51)) (and (<= 4 main_y) (<= main_y 4) (<= main_x 4) (<= 4 main_x)) (and (<= 54 main_y) (<= main_y 54) (<= 54 main_x) (<= main_x 54)) (and (<= main_x 33) (<= 33 main_x) (<= main_y 33) (<= 33 main_y)) (and (<= 37 main_x) (<= 37 main_y) (<= main_y 37) (<= main_x 37)) (and (<= 20 main_y) (<= 20 main_x) (<= main_y 20) (<= main_x 20)) (and (<= 26 main_y) (<= main_x 26) (<= 26 main_x) (<= main_y 26)) (and (<= 86 main_x) (<= 86 main_y) (<= main_x 86) (<= main_y 86)) (and (<= main_x 27) (<= main_y 27) (<= 27 main_y) (<= 27 main_x)) (and (<= main_y 95) (<= 95 main_x) (<= 95 main_y) (<= main_x 95)) (and (<= main_x 56) (<= 56 main_x) (<= 56 main_y) (<= main_y 56)) (and (<= 1 main_x) (<= main_x 1) (<= main_y 1) (<= 1 main_y)) (and (<= main_y 75) (<= main_x 75) (<= 75 main_y) (<= 75 main_x)) (and (<= main_x 62) (<= 62 main_x) (<= 62 main_y) (<= main_y 62)) (and (<= 68 main_y) (<= main_x 68) (<= main_y 68) (<= 68 main_x)) (and (<= main_y 78) (<= 78 main_x) (<= 78 main_y) (<= main_x 78)) (and (<= main_y 3) (<= 3 main_y) (<= 3 main_x) (<= main_x 3)) (and (<= main_x 25) (<= main_y 25) (<= 25 main_x) (<= 25 main_y)) (and (<= main_x 36) (<= main_y 36) (<= 36 main_x) (<= 36 main_y)) (and (<= 57 main_y) (<= main_x 57) (<= main_y 57) (<= 57 main_x)) (and (<= 5 main_x) (<= main_x 5) (<= main_y 5) (<= 5 main_y)) (and (<= main_y 17) (<= 17 main_y) (<= 17 main_x) (<= main_x 17)) (and (<= 82 main_x) (<= 82 main_y) (<= main_x 82) (<= main_y 82)) (and (<= main_y 83) (<= 83 main_x) (<= main_x 83) (<= 83 main_y)) (and (<= 77 main_x) (<= 77 main_y) (<= main_x 77) (<= main_y 77)) (and (<= 31 main_x) (<= 31 main_y) (<= main_y 31) (<= main_x 31)) (and (<= main_y 98) (<= main_x 98) (<= 98 main_y) (<= 98 main_x)) (and (<= 71 main_y) (<= 71 main_x) (<= main_y 71) (<= main_x 71)) (and (<= main_y 41) (<= 41 main_x) (<= 41 main_y) (<= main_x 41)) (and (<= 30 main_x) (<= 30 main_y) (<= main_x 30) (<= main_y 30)) (and (<= 24 main_y) (<= main_x 24) (<= main_y 24) (<= 24 main_x)) (and (<= main_y 50) (<= 50 main_y) (<= main_x 50) (<= 50 main_x)) (and (<= 84 main_y) (<= main_y 84) (<= main_x 84) (<= 84 main_x)) (and (<= main_y 93) (<= 93 main_y) (<= 93 main_x) (<= main_x 93)) (and (<= main_y 60) (<= main_x 60) (<= 60 main_y) (<= 60 main_x)) (and (<= 29 main_y) (<= main_x 29) (<= 29 main_x) (<= main_y 29)) (and (<= main_y 40) (<= main_x 40) (<= 40 main_y) (<= 40 main_x)) (and (<= main_y 53) (<= 53 main_y) (<= main_x 53) (<= 53 main_x)) (and (<= main_y 58) (<= 58 main_y) (<= 58 main_x) (<= main_x 58)) (and (<= 67 main_x) (<= 67 main_y) (<= main_y 67) (<= main_x 67)) (and (<= main_y 22) (<= main_x 22) (<= 22 main_x) (<= 22 main_y)) (and (<= 39 main_y) (<= 39 main_x) (<= main_x 39) (<= main_y 39)) (and (<= 13 main_x) (<= main_x 13) (<= main_y 13) (<= 13 main_y)) (and (<= main_y 79) (<= 79 main_x) (<= main_x 79) (<= 79 main_y)) (and (<= 69 main_x) (<= main_x 69) (<= 69 main_y) (<= main_y 69)) (and (<= 81 main_x) (<= main_y 81) (<= main_x 81) (<= 81 main_y)) (and (<= 28 main_y) (<= main_x 28) (<= 28 main_x) (<= main_y 28)) (and (<= main_y 66) (<= main_x 66) (<= 66 main_x) (<= 66 main_y)) (and (<= main_x 91) (<= 91 main_y) (<= 91 main_x) (<= main_y 91)) (and (<= 34 main_x) (<= main_y 34) (<= main_x 34) (<= 34 main_y)) (and (<= 89 main_x) (<= main_y 89) (<= main_x 89) (<= 89 main_y)) (and (<= 10 main_y) (<= main_x 10) (<= main_y 10) (<= 10 main_x)) (and (<= main_x 16) (<= main_y 16) (<= 16 main_x) (<= 16 main_y)) (and (<= 100 main_x) (<= main_y 100) (< 99 main_y)) (and (<= 2 main_y) (<= 2 main_x) (<= main_y 2) (<= main_x 2)) (and (<= main_x 7) (<= 7 main_y) (<= 7 main_x) (<= main_y 7)) (and (<= main_x 72) (<= 72 main_x) (<= 72 main_y) (<= main_y 72)) (and (<= 48 main_x) (<= main_x 48) (<= main_y 48) (<= 48 main_y)) (and (<= main_y 76) (<= main_x 76) (<= 76 main_y) (<= 76 main_x)) (and (<= 96 main_x) (<= main_y 96) (<= 96 main_y) (<= main_x 96)) (and (<= 45 main_x) (<= 45 main_y) (<= main_y 45) (<= main_x 45)) (and (<= 11 main_x) (<= main_x 11) (<= 11 main_y) (<= main_y 11)) (and (<= main_x 19) (<= main_y 19) (<= 19 main_x) (<= 19 main_y)) (and (<= 90 main_x) (<= main_y 90) (<= 90 main_y) (<= main_x 90)) (and (<= main_x 70) (<= main_y 70) (<= 70 main_x) (<= 70 main_y)) (and (<= 23 main_x) (<= 23 main_y) (<= main_y 23) (<= main_x 23))) [2018-12-03 19:33:17,709 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-12-03 19:33:17,742 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:33:17 BoogieIcfgContainer [2018-12-03 19:33:17,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 19:33:17,744 INFO L168 Benchmark]: Toolchain (without parser) took 408468.42 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 574.6 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -178.6 MB). Peak memory consumption was 396.0 MB. Max. memory is 7.1 GB. [2018-12-03 19:33:17,744 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:33:17,744 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.98 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:33:17,745 INFO L168 Benchmark]: Boogie Preprocessor took 23.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-03 19:33:17,745 INFO L168 Benchmark]: RCFGBuilder took 206.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-03 19:33:17,745 INFO L168 Benchmark]: TraceAbstraction took 408191.73 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 574.6 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -199.8 MB). Peak memory consumption was 374.8 MB. Max. memory is 7.1 GB. [2018-12-03 19:33:17,747 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.98 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 206.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 408191.73 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 574.6 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -199.8 MB). Peak memory consumption was 374.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: 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: 24]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 49 && y <= 49) && 49 <= x) && 49 <= y) || (((8 <= y && y <= 8) && x <= 8) && 8 <= x)) || (((99 <= x && y <= 99) && 99 <= y) && x <= 99)) || (((42 <= x && y <= 42) && x <= 42) && 42 <= y)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((9 <= y && 9 <= x) && x <= 9) && y <= 9)) || (((55 <= y && y <= 55) && 55 <= x) && x <= 55)) || (((74 <= x && x <= 74) && 74 <= y) && y <= 74)) || (((x <= 97 && 97 <= y) && y <= 97) && 97 <= x)) || (((12 <= x && 12 <= y) && y <= 12) && x <= 12)) || (((x <= 65 && y <= 65) && 65 <= x) && 65 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((y <= 73 && x <= 73) && 73 <= x) && 73 <= y)) || (((6 <= x && x <= 6) && 6 <= y) && y <= 6)) || (((14 <= x && 14 <= y) && y <= 14) && x <= 14)) || (((x <= 0 && 0 <= y) && 0 <= x) && y <= 0)) || (((y <= 44 && x <= 44) && 44 <= y) && 44 <= x)) || (((38 <= x && 38 <= y) && y <= 38) && x <= 38)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((21 <= y && 21 <= x) && x <= 21) && y <= 21)) || (((94 <= x && 94 <= y) && x <= 94) && y <= 94)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((y <= 46 && 46 <= x) && x <= 46) && 46 <= y)) || (((x <= 18 && 18 <= y) && 18 <= x) && y <= 18)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || 101 <= x) || (((88 <= y && y <= 88) && 88 <= x) && x <= 88)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 92 && 92 <= y) && y <= 92) && 92 <= x)) || (((87 <= x && x <= 87) && 87 <= y) && y <= 87)) || (((35 <= y && y <= 35) && x <= 35) && 35 <= x)) || (((85 <= x && x <= 85) && 85 <= y) && y <= 85)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((15 <= y && y <= 15) && 15 <= x) && x <= 15)) || (((y <= 64 && 64 <= x) && x <= 64) && 64 <= y)) || (((47 <= x && 47 <= y) && y <= 47) && x <= 47)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((4 <= y && y <= 4) && x <= 4) && 4 <= x)) || (((54 <= y && y <= 54) && 54 <= x) && x <= 54)) || (((x <= 33 && 33 <= x) && y <= 33) && 33 <= y)) || (((37 <= x && 37 <= y) && y <= 37) && x <= 37)) || (((20 <= y && 20 <= x) && y <= 20) && x <= 20)) || (((26 <= y && x <= 26) && 26 <= x) && y <= 26)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((y <= 95 && 95 <= x) && 95 <= y) && x <= 95)) || (((x <= 56 && 56 <= x) && 56 <= y) && y <= 56)) || (((1 <= x && x <= 1) && y <= 1) && 1 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 62 && 62 <= x) && 62 <= y) && y <= 62)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 78 && 78 <= x) && 78 <= y) && x <= 78)) || (((y <= 3 && 3 <= y) && 3 <= x) && x <= 3)) || (((x <= 25 && y <= 25) && 25 <= x) && 25 <= y)) || (((x <= 36 && y <= 36) && 36 <= x) && 36 <= y)) || (((57 <= y && x <= 57) && y <= 57) && 57 <= x)) || (((5 <= x && x <= 5) && y <= 5) && 5 <= y)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((82 <= x && 82 <= y) && x <= 82) && y <= 82)) || (((y <= 83 && 83 <= x) && x <= 83) && 83 <= y)) || (((77 <= x && 77 <= y) && x <= 77) && y <= 77)) || (((31 <= x && 31 <= y) && y <= 31) && x <= 31)) || (((y <= 98 && x <= 98) && 98 <= y) && 98 <= x)) || (((71 <= y && 71 <= x) && y <= 71) && x <= 71)) || (((y <= 41 && 41 <= x) && 41 <= y) && x <= 41)) || (((30 <= x && 30 <= y) && x <= 30) && y <= 30)) || (((24 <= y && x <= 24) && y <= 24) && 24 <= x)) || (((y <= 50 && 50 <= y) && x <= 50) && 50 <= x)) || (((84 <= y && y <= 84) && x <= 84) && 84 <= x)) || (((y <= 93 && 93 <= y) && 93 <= x) && x <= 93)) || (((y <= 60 && x <= 60) && 60 <= y) && 60 <= x)) || (((29 <= y && x <= 29) && 29 <= x) && y <= 29)) || (((y <= 40 && x <= 40) && 40 <= y) && 40 <= x)) || (((y <= 53 && 53 <= y) && x <= 53) && 53 <= x)) || (((y <= 58 && 58 <= y) && 58 <= x) && x <= 58)) || (((67 <= x && 67 <= y) && y <= 67) && x <= 67)) || (((y <= 22 && x <= 22) && 22 <= x) && 22 <= y)) || (((39 <= y && 39 <= x) && x <= 39) && y <= 39)) || (((13 <= x && x <= 13) && y <= 13) && 13 <= y)) || (((y <= 79 && 79 <= x) && x <= 79) && 79 <= y)) || (((69 <= x && x <= 69) && 69 <= y) && y <= 69)) || (((81 <= x && y <= 81) && x <= 81) && 81 <= y)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((y <= 66 && x <= 66) && 66 <= x) && 66 <= y)) || (((x <= 91 && 91 <= y) && 91 <= x) && y <= 91)) || (((34 <= x && y <= 34) && x <= 34) && 34 <= y)) || (((89 <= x && y <= 89) && x <= 89) && 89 <= y)) || (((10 <= y && x <= 10) && y <= 10) && 10 <= x)) || (((x <= 16 && y <= 16) && 16 <= x) && 16 <= y)) || ((100 <= x && y <= 100) && 99 < y)) || (((2 <= y && 2 <= x) && y <= 2) && x <= 2)) || (((x <= 7 && 7 <= y) && 7 <= x) && y <= 7)) || (((x <= 72 && 72 <= x) && 72 <= y) && y <= 72)) || (((48 <= x && x <= 48) && y <= 48) && 48 <= y)) || (((y <= 76 && x <= 76) && 76 <= y) && 76 <= x)) || (((96 <= x && y <= 96) && 96 <= y) && x <= 96)) || (((45 <= x && 45 <= y) && y <= 45) && x <= 45)) || (((11 <= x && x <= 11) && 11 <= y) && y <= 11)) || (((x <= 19 && y <= 19) && 19 <= x) && 19 <= y)) || (((90 <= x && y <= 90) && 90 <= y) && x <= 90)) || (((x <= 70 && y <= 70) && 70 <= x) && 70 <= y)) || (((23 <= x && 23 <= y) && y <= 23) && x <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 408.0s OverallTime, 102 OverallIterations, 101 TraceHistogramMax, 19.3s AutomataDifference, 0.0s DeadEndRemovalTime, 2.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 19496 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15553 GetRequests, 5247 SyntacticMatches, 2554 SemanticMatches, 7752 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126225 ImplicationChecksByTransitivity, 372.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1314 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 377.2s InterpolantComputationTime, 10605 NumberOfCodeBlocks, 10605 NumberOfCodeBlocksAsserted, 1068 NumberOfCheckSat, 15553 ConstructedInterpolants, 0 QuantifiedInterpolants, 3290577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21100 ConjunctsInSsa, 5351 ConjunctsInUnsatCore, 302 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/520251 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...